Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applic...Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applications. The Terahertz region has been the focus of research worldwide since early 1990s. Due to their unique characteristics, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, and biomedical imaging.展开更多
During the past few years, the terahertz （THz） frequency regime has had renewed scientific and technological interest because of recent breakthroughs in the areas of high power sources, sensitive detectors, novel ma...During the past few years, the terahertz （THz） frequency regime has had renewed scientific and technological interest because of recent breakthroughs in the areas of high power sources, sensitive detectors, novel materials, and high resolution video imaging. Because it lies between the radio frequencies and infrared wavelengths, the terahertz electromagnetic region was thought to be promising for practical applications （300 micrometers wavelength corresponds to 1 THz frequency）, but it suffered from very high attenuation through the atmosphere （above 1 dB/meter）, and was found to be difficult to generate, modulate, and detect. On the other hand, many non-polar dielectric materials are transparent to THz waves,展开更多
Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applic...Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applications. The Terahertz region has been the focus of research worldwide since early 1990s. Due to their unique characteristics, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, and biomedical imaging.展开更多
Terahertz wave, sitting in the gap between middle infrared and millimeter wave, has been known as the last vacant area in spectrum that has not been quite understood and brought into applications. It has been the focu...Terahertz wave, sitting in the gap between middle infrared and millimeter wave, has been known as the last vacant area in spectrum that has not been quite understood and brought into applications. It has been the focus of research worldwide since early 1990s. Due to the unique characteristics of Terahertz wave, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, biomedical imaging, etc.展开更多
Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applic...Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applications. The Terahertz region has been the focus of research worldwide since early 1990s. Due to their unique characteristics, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, and biomedical imaging.展开更多
Terahertz biotechnology has been increasingly applied in various biomedical fields and has especially shown great potential for application in brain sciences.In this article,we review the development of terahertz biot...Terahertz biotechnology has been increasingly applied in various biomedical fields and has especially shown great potential for application in brain sciences.In this article,we review the development of terahertz biotechnology and its applications in the field of neuropsychiatry.Available evidence indicates promising prospects for the use of terahertz spectroscopy and terahertz imaging techniques in the diagnosis of amyloid disease,cerebrovascular disease,glioma,psychiatric disease,traumatic brain injury,and myelin deficit.In vitro and animal experiments have also demonstrated the potential therapeutic value of terahertz technology in some neuropsychiatric diseases.Although the precise underlying mechanism of the interactions between terahertz electromagnetic waves and the biosystem is not yet fully understood,the research progress in this field shows great potential for biomedical noninvasive diagnostic and therapeutic applications.However,the biosafety of terahertz radiation requires further exploration regarding its two-sided efficacy in practical applications.This review demonstrates that terahertz biotechnology has the potential to be a promising method in the field of neuropsychiatry based on its unique advantages.展开更多
Recent advancements in nanotechnology have revolutionized terahertz(THz)technology.By enabling the creation of compact,efficient devices through nanoscale structures,such as nano-thick heterostructures,metasurfaces,an...Recent advancements in nanotechnology have revolutionized terahertz(THz)technology.By enabling the creation of compact,efficient devices through nanoscale structures,such as nano-thick heterostructures,metasurfaces,and hybrid systems,these innovations offer unprecedented control over THz wave generation and modulation.This has led to substantial enhancements in THz spectroscopy,imaging,and especially bio-applications,providing higher resolution and sensitivity.This review comprehensively examines the latest advancements in nanoengineered THz technology,beginning with state-of-the-art THz generation methods based on heterostructures,metasurfaces,and hybrid systems,followed by THz modulation techniques,including both homogeneous and individual modulation.Subsequently,it explores bio-applications such as novel biosensing and biofunction techniques.Finally,it summarizes findings and reflects on future trends and challenges in the field.Each section focuses on the physical mechanisms,structural designs,and performances,aiming to provide a thorough understanding of the advancements and potential of this rapidly evolving technology domain.This review aims to provide insights into the creation of next-generation nanoscale THz devices and applications while establishing a comprehensive foundation for addressing key issues that limit the full implementation of these promising technologies in real-world scenarios.展开更多
A systematic terahertz spectroscopy study of the mineral phase transformation process of natural pyrite samples heated in a nitrogen atmosphere is conducted.In addition,the pyrolysis process of pyrite in the 400℃–80...A systematic terahertz spectroscopy study of the mineral phase transformation process of natural pyrite samples heated in a nitrogen atmosphere is conducted.In addition,the pyrolysis process of pyrite in the 400℃–800℃temperature range is analyzed and discussed.This study is based on X-ray diffraction(XRD)and thermogravimetric–derivative thermogravimetric(TG-DTG)analysis of the corresponding thermal transformation sequences of pyrite,magnetopyrite,and sulfurous pyrite as the desulfurization process proceeds.Terahertz time-domain spectroscopy is employed to characterize the optical properties of the pyrolysis products.The results show that pyrite,magnetopyrite and sulfurous pyrite exhibit different absorption coefficients and refractive indices in the terahertz frequency band.The different optical properties of these products provide useful information for the investigation of the pyrolysis process of pyrite and the magnetic properties of environmental sediments.展开更多
The terahertz（THz）region of the electromagnetic spectrum,spanning the range between 0.1THz and 10THz,has experienced a renaissance due to technological developments in sources and detectors.The terahertz time domain...The terahertz（THz）region of the electromagnetic spectrum,spanning the range between 0.1THz and 10THz,has experienced a renaissance due to technological developments in sources and detectors.The terahertz time domain spectroscopy（THz-TDS）system is by far one of the most important methods to generate and detect the THz wave.In physics,THz-TDS is a spectroscopic technique in which the properties of a material are probed with shortpulses of terahertz radiation.展开更多
Ultrashort pulse transmission has been recognized as a primary problem that fundamentally hinders the development of ultrafast electronics beyond the current nanosecond timescale.This requires a transmission line or w...Ultrashort pulse transmission has been recognized as a primary problem that fundamentally hinders the development of ultrafast electronics beyond the current nanosecond timescale.This requires a transmission line or waveguide that exhibits an all-pass frequency behavior for the transmitted ultrashort pulse signals.However,this type of waveguiding structure has not yet been practically developed;groundbreaking innovations and advances in signal transmission technology are urgently required to address this scenario.Herein,we present a synthesized all-pass waveguide that demonstrates record guidedwave controlling capabilities,including eigenmode reshaping,polarization rotation,loss reduction,and dispersion improvement.We experimentally developed two waveguides for use in ultrabroad frequency ranges(direct current(DC)-to-millimeter-wave and DC-to-terahertz).Our results suggest that the waveguides can efficiently transmit picosecond electrical pulses while maintaining signal integrity.This waveguide technology is an important breakthrough in the evolution of ultrafast electronics,providing a path towards frequency-engineered ultrashort pulses for low-loss and low-dispersion transmissions.展开更多
From energy generation to transportation, from energy distribution to storage, from semiconductor processing to communications, and from portable devices to data centers, energy consumption has grown to be a major lim...From energy generation to transportation, from energy distribution to storage, from semiconductor processing to communications, and from portable devices to data centers, energy consumption has grown to be a major limitation to usability and performance. Therefore, energy-efficient technologies become an active research area motivated by energy necessity and environmental concerns. With energy-efficient technologies, a number of epoch-making technical approaches can be expected. Energy efficiency technologies are affecting all forms of energy conversion and all aspects of life.展开更多
Although terahertz(THz)spectroscopy and imaging offer a variety of applications in medical diagnosis of malignant and benign neoplasms,their translation into clinical practice is hampered by the absence of endoscopic ...Although terahertz(THz)spectroscopy and imaging offer a variety of applications in medical diagnosis of malignant and benign neoplasms,their translation into clinical practice is hampered by the absence of endoscopic systems capable of sensing the THz optical properties of the hard-to-access tissues.In this review,we focus on recent attempts to address this challenge.To better highlight the need for THz endoscopes,we start with a brief overview of THz medical applications,with an emphasis on neoplasms diagnosis.We then consider the two existing principles of THz endoscopy.The first uses the fiber-coupled THz photoconductive antennas(PCAs)for the THz generation and detection in close proximity to a hard-to-access object,where optical fibers are applied to flexibly deliver the laser pump and probe beams to the THz emitter and detector.The key technology of the second approach is the THz optical fibers capable of delivering the THz waves to an analyte and then detecting the reflected and back-propagated THz signal.Despite this approach still lacking the efficient commercially available THz fiber optics,most recent developments pave the way to solve these problems.In this review,several notable examples of THz endoscopic systems based on different guiding mechanisms,material platform,and manufacturing strategies are discussed.展开更多
The beam splitter is one of the most crucial components in optical and electromagnetic systems,and it is also expected to be applied in terahertz(THz)technology.However,most existing beam splitters operate in only a s...The beam splitter is one of the most crucial components in optical and electromagnetic systems,and it is also expected to be applied in terahertz(THz)technology.However,most existing beam splitters operate in only a single working mode,restricting their applications.This paper reports a method for the inverse design of a doublet meta-device consisting of two stacked metasurfaces functioning as a reconfigurable THz beam splitter.It is made of photo-curable high-temperature resin using 3D printing technology.By simply adjusting the relative rotation angles between the two metasurfaces to 0°,90°,180°,and 270°,the meta-device can produce four distinct focal patterns,thus achieving four different working modes.This scheme avoids introducing complicated active components,offering a simple,low-cost design of a signal divider in future 6G THz communication systems.展开更多
To accurately diagnose the aging condition of the vehicle-mounted high-voltage cable terminals under the combined electro-thermal stress,this paper proposes a terahertz frequency spectrum technology-based method.First...To accurately diagnose the aging condition of the vehicle-mounted high-voltage cable terminals under the combined electro-thermal stress,this paper proposes a terahertz frequency spectrum technology-based method.First,an electro-thermal aging platform is established in the laboratory to obtain the test samples of ethylene-propylene rubber(EPR)cable terminals with different aging gradients.Then,the degree of electro-thermal aging is characterized by frequency spectrum,absorption coefficient spectrum,absorption spectrum,refractive index and dielectric constant in the terahertz domain.Moreover,the micro-morphology and micro-area structure of the test samples under different aging gradients are also observed by scanning electron microscopy,and both the material and chemical properties are analyzed.The findings demonstrate that terahertz frequency spectra offer significant benefits in non-destructively detecting and identifying the insulation condition of vehicle cable terminals during electro-thermal aging.Laboratory tests confirm the feasibility of utilizing the terahertz frequency spectrum to assess the insulation aging state of EPR cable terminals,making it potentially applicable for on-site purposes.展开更多
Terahertz radiation, defined in the frequency range of O. 1-10 THz, has been exploited to demonstrate unique properties that do not apply to the adjacent domains of the electromagnetic waves, such as infrared and micr...Terahertz radiation, defined in the frequency range of O. 1-10 THz, has been exploited to demonstrate unique properties that do not apply to the adjacent domains of the electromagnetic waves, such as infrared and microwave. Recent advances in terahertz science and technology hold promise for a wide variety of essential applications, particularly in spectroscopy, sensing, imaging,展开更多
MBene materials,as emerging two-dimensional(2D)transition metal borides,exhibit exceptional potential for electromagnetic(EM)wave absorption due to their high conductivity and tunable surface properties.However,their ...MBene materials,as emerging two-dimensional(2D)transition metal borides,exhibit exceptional potential for electromagnetic(EM)wave absorption due to their high conductivity and tunable surface properties.However,their structural instability and limited EM absorption efficiency in the gigahertz(GHz)or terahertz(THz)band remain critical challenges.Controlled nitridation enables the construction of heterogeneous interfaces,providing an effective strategy for precisely tailoring EM absorption properties.Herein,through NH_(3) annealing of exfoliated Mo_(1.33)B_(2)T_(x) nanosheets,we engineered a hierarchical nanoflower morphology with MoN/MoB heterointerfaces,which synergistically enhanced dielectric loss and impedance matching.The optimized Mo_(1.33)B_(2)T_(x)-650 absorber achieved a record minimum reflection loss(RL_(min))of−61.4 dB and a broad effective absorption bandwidth across key GHz frequencies.Notably,monolayer Mo_(1.33)B_(2)T_(x) nanosheets simultaneously exhibited ultrahigh THz wave absorption(94.54%at 0.5–3.8 THz)and near-perfect visible transparency(99.12%),unlocking unprecedented potential for transparent optoelectronic devices.Combined with superior thermal and mechanical properties,this study establishes a generalizable paradigm for designing multifunctional MBene-based absorbers operating across GHz to THz spectra.展开更多
文摘Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applications. The Terahertz region has been the focus of research worldwide since early 1990s. Due to their unique characteristics, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, and biomedical imaging.
文摘During the past few years, the terahertz （THz） frequency regime has had renewed scientific and technological interest because of recent breakthroughs in the areas of high power sources, sensitive detectors, novel materials, and high resolution video imaging. Because it lies between the radio frequencies and infrared wavelengths, the terahertz electromagnetic region was thought to be promising for practical applications （300 micrometers wavelength corresponds to 1 THz frequency）, but it suffered from very high attenuation through the atmosphere （above 1 dB/meter）, and was found to be difficult to generate, modulate, and detect. On the other hand, many non-polar dielectric materials are transparent to THz waves,
文摘Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applications. The Terahertz region has been the focus of research worldwide since early 1990s. Due to their unique characteristics, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, and biomedical imaging.
文摘Terahertz wave, sitting in the gap between middle infrared and millimeter wave, has been known as the last vacant area in spectrum that has not been quite understood and brought into applications. It has been the focus of research worldwide since early 1990s. Due to the unique characteristics of Terahertz wave, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, biomedical imaging, etc.
文摘Terahertz waves, sitting in the gap between the middle infrared and millimeter wave regions, are known as the last vacant area of the electromagnetic spectrum that has not quite been understood and brought into applications. The Terahertz region has been the focus of research worldwide since early 1990s. Due to their unique characteristics, Terahertz technologies have a wide range of applications, such as hazard detection, high speed data communications, radio astronomy, and biomedical imaging.
基金supported by grants from the National Key R&D Program of China,No.2017YFC0909200(to DC)the National Natural Science Foundation of China,No.62075225(to HZ)+1 种基金Zhejiang Provincial Medical Health Science and Technology Project,No.2023XY053(to ZP)Zhejiang Provincial Traditional Chinese Medical Science and Technology Project,No.2023ZL703(to ZP).
文摘Terahertz biotechnology has been increasingly applied in various biomedical fields and has especially shown great potential for application in brain sciences.In this article,we review the development of terahertz biotechnology and its applications in the field of neuropsychiatry.Available evidence indicates promising prospects for the use of terahertz spectroscopy and terahertz imaging techniques in the diagnosis of amyloid disease,cerebrovascular disease,glioma,psychiatric disease,traumatic brain injury,and myelin deficit.In vitro and animal experiments have also demonstrated the potential therapeutic value of terahertz technology in some neuropsychiatric diseases.Although the precise underlying mechanism of the interactions between terahertz electromagnetic waves and the biosystem is not yet fully understood,the research progress in this field shows great potential for biomedical noninvasive diagnostic and therapeutic applications.However,the biosafety of terahertz radiation requires further exploration regarding its two-sided efficacy in practical applications.This review demonstrates that terahertz biotechnology has the potential to be a promising method in the field of neuropsychiatry based on its unique advantages.
基金supported by the National Natural Science Foundation of China(12304434,12304354,and 12004362).
文摘Recent advancements in nanotechnology have revolutionized terahertz(THz)technology.By enabling the creation of compact,efficient devices through nanoscale structures,such as nano-thick heterostructures,metasurfaces,and hybrid systems,these innovations offer unprecedented control over THz wave generation and modulation.This has led to substantial enhancements in THz spectroscopy,imaging,and especially bio-applications,providing higher resolution and sensitivity.This review comprehensively examines the latest advancements in nanoengineered THz technology,beginning with state-of-the-art THz generation methods based on heterostructures,metasurfaces,and hybrid systems,followed by THz modulation techniques,including both homogeneous and individual modulation.Subsequently,it explores bio-applications such as novel biosensing and biofunction techniques.Finally,it summarizes findings and reflects on future trends and challenges in the field.Each section focuses on the physical mechanisms,structural designs,and performances,aiming to provide a thorough understanding of the advancements and potential of this rapidly evolving technology domain.This review aims to provide insights into the creation of next-generation nanoscale THz devices and applications while establishing a comprehensive foundation for addressing key issues that limit the full implementation of these promising technologies in real-world scenarios.
基金the National Natural Science Foundation of China(61805214)Open Fund of State Key Laboratory of Infrared Physics(SITP-NLIST-YB-2022-12)+2 种基金Piesat Information Technology remote sensing interdisciplinary research project(HTHT202202)the Fundamental Research Funds for the Central Universities(2-9-2022-203)Young Elite Scientists Sponsorship Program by Bast(BYESS2020037).
文摘A systematic terahertz spectroscopy study of the mineral phase transformation process of natural pyrite samples heated in a nitrogen atmosphere is conducted.In addition,the pyrolysis process of pyrite in the 400℃–800℃temperature range is analyzed and discussed.This study is based on X-ray diffraction(XRD)and thermogravimetric–derivative thermogravimetric(TG-DTG)analysis of the corresponding thermal transformation sequences of pyrite,magnetopyrite,and sulfurous pyrite as the desulfurization process proceeds.Terahertz time-domain spectroscopy is employed to characterize the optical properties of the pyrolysis products.The results show that pyrite,magnetopyrite and sulfurous pyrite exhibit different absorption coefficients and refractive indices in the terahertz frequency band.The different optical properties of these products provide useful information for the investigation of the pyrolysis process of pyrite and the magnetic properties of environmental sediments.
文摘The terahertz（THz）region of the electromagnetic spectrum,spanning the range between 0.1THz and 10THz,has experienced a renaissance due to technological developments in sources and detectors.The terahertz time domain spectroscopy（THz-TDS）system is by far one of the most important methods to generate and detect the THz wave.In physics,THz-TDS is a spectroscopic technique in which the properties of a material are probed with shortpulses of terahertz radiation.
基金supported in part by the Natural Sciences and Engineering Research Council of Canada(NSERC)Discovery Grantin part by the NSERC–Huawei Industrial Research Chair Program。
文摘Ultrashort pulse transmission has been recognized as a primary problem that fundamentally hinders the development of ultrafast electronics beyond the current nanosecond timescale.This requires a transmission line or waveguide that exhibits an all-pass frequency behavior for the transmitted ultrashort pulse signals.However,this type of waveguiding structure has not yet been practically developed;groundbreaking innovations and advances in signal transmission technology are urgently required to address this scenario.Herein,we present a synthesized all-pass waveguide that demonstrates record guidedwave controlling capabilities,including eigenmode reshaping,polarization rotation,loss reduction,and dispersion improvement.We experimentally developed two waveguides for use in ultrabroad frequency ranges(direct current(DC)-to-millimeter-wave and DC-to-terahertz).Our results suggest that the waveguides can efficiently transmit picosecond electrical pulses while maintaining signal integrity.This waveguide technology is an important breakthrough in the evolution of ultrafast electronics,providing a path towards frequency-engineered ultrashort pulses for low-loss and low-dispersion transmissions.
文摘From energy generation to transportation, from energy distribution to storage, from semiconductor processing to communications, and from portable devices to data centers, energy consumption has grown to be a major limitation to usability and performance. Therefore, energy-efficient technologies become an active research area motivated by energy necessity and environmental concerns. With energy-efficient technologies, a number of epoch-making technical approaches can be expected. Energy efficiency technologies are affecting all forms of energy conversion and all aspects of life.
基金supported by the Russian Science Foundation,Project#25-79-30006,while the work of D.S.P.on Sec.3,was supported by the state assignment of the NRC“Kurchatov Institute”。
文摘Although terahertz(THz)spectroscopy and imaging offer a variety of applications in medical diagnosis of malignant and benign neoplasms,their translation into clinical practice is hampered by the absence of endoscopic systems capable of sensing the THz optical properties of the hard-to-access tissues.In this review,we focus on recent attempts to address this challenge.To better highlight the need for THz endoscopes,we start with a brief overview of THz medical applications,with an emphasis on neoplasms diagnosis.We then consider the two existing principles of THz endoscopy.The first uses the fiber-coupled THz photoconductive antennas(PCAs)for the THz generation and detection in close proximity to a hard-to-access object,where optical fibers are applied to flexibly deliver the laser pump and probe beams to the THz emitter and detector.The key technology of the second approach is the THz optical fibers capable of delivering the THz waves to an analyte and then detecting the reflected and back-propagated THz signal.Despite this approach still lacking the efficient commercially available THz fiber optics,most recent developments pave the way to solve these problems.In this review,several notable examples of THz endoscopic systems based on different guiding mechanisms,material platform,and manufacturing strategies are discussed.
基金National Natural Science Foundation of China(62231001)Hong Kong Research Grants Council Collaborative Research Fund(C1009-22G)。
文摘The beam splitter is one of the most crucial components in optical and electromagnetic systems,and it is also expected to be applied in terahertz(THz)technology.However,most existing beam splitters operate in only a single working mode,restricting their applications.This paper reports a method for the inverse design of a doublet meta-device consisting of two stacked metasurfaces functioning as a reconfigurable THz beam splitter.It is made of photo-curable high-temperature resin using 3D printing technology.By simply adjusting the relative rotation angles between the two metasurfaces to 0°,90°,180°,and 270°,the meta-device can produce four distinct focal patterns,thus achieving four different working modes.This scheme avoids introducing complicated active components,offering a simple,low-cost design of a signal divider in future 6G THz communication systems.
基金supported in part by the National Natural Science Foundation of China(52167018)Opening Foundation of the National Rail Transportation Electrification and Automation Engineering Technology ResearchCenter(NEEC-2022-B19).
文摘To accurately diagnose the aging condition of the vehicle-mounted high-voltage cable terminals under the combined electro-thermal stress,this paper proposes a terahertz frequency spectrum technology-based method.First,an electro-thermal aging platform is established in the laboratory to obtain the test samples of ethylene-propylene rubber(EPR)cable terminals with different aging gradients.Then,the degree of electro-thermal aging is characterized by frequency spectrum,absorption coefficient spectrum,absorption spectrum,refractive index and dielectric constant in the terahertz domain.Moreover,the micro-morphology and micro-area structure of the test samples under different aging gradients are also observed by scanning electron microscopy,and both the material and chemical properties are analyzed.The findings demonstrate that terahertz frequency spectra offer significant benefits in non-destructively detecting and identifying the insulation condition of vehicle cable terminals during electro-thermal aging.Laboratory tests confirm the feasibility of utilizing the terahertz frequency spectrum to assess the insulation aging state of EPR cable terminals,making it potentially applicable for on-site purposes.
文摘Terahertz radiation, defined in the frequency range of O. 1-10 THz, has been exploited to demonstrate unique properties that do not apply to the adjacent domains of the electromagnetic waves, such as infrared and microwave. Recent advances in terahertz science and technology hold promise for a wide variety of essential applications, particularly in spectroscopy, sensing, imaging,
基金supported by the National Natural Science Foundation of China (12104236)Shandong Provincial Natural Science Foundation (ZR2022ME026)+2 种基金Key Research and Development Program of Shandong Province (2022CXGC020310)Key Research and Development Program of Zibo City (2021SNPT0015)Youth Innovation Team of Colleges and Universities in Shandong Province (2023KJ147)。
文摘MBene materials,as emerging two-dimensional(2D)transition metal borides,exhibit exceptional potential for electromagnetic(EM)wave absorption due to their high conductivity and tunable surface properties.However,their structural instability and limited EM absorption efficiency in the gigahertz(GHz)or terahertz(THz)band remain critical challenges.Controlled nitridation enables the construction of heterogeneous interfaces,providing an effective strategy for precisely tailoring EM absorption properties.Herein,through NH_(3) annealing of exfoliated Mo_(1.33)B_(2)T_(x) nanosheets,we engineered a hierarchical nanoflower morphology with MoN/MoB heterointerfaces,which synergistically enhanced dielectric loss and impedance matching.The optimized Mo_(1.33)B_(2)T_(x)-650 absorber achieved a record minimum reflection loss(RL_(min))of−61.4 dB and a broad effective absorption bandwidth across key GHz frequencies.Notably,monolayer Mo_(1.33)B_(2)T_(x) nanosheets simultaneously exhibited ultrahigh THz wave absorption(94.54%at 0.5–3.8 THz)and near-perfect visible transparency(99.12%),unlocking unprecedented potential for transparent optoelectronic devices.Combined with superior thermal and mechanical properties,this study establishes a generalizable paradigm for designing multifunctional MBene-based absorbers operating across GHz to THz spectra.
