Recent conceptual demonstrations of direct photocurrent readout of light vortices have enabled the development of light orbital angular momentum-sensitive focal plane arrays and on-chip integration of orbital angular ...Recent conceptual demonstrations of direct photocurrent readout of light vortices have enabled the development of light orbital angular momentum-sensitive focal plane arrays and on-chip integration of orbital angular momentum detection.However,known orbital angular momentum-sensitive materials are limited to two topological Weyl Semimetals belonging to the C2v point group,namely,WTe2 and TaIrTe4.Both are fragile under ambient conditions and challenging for large-scale epitaxial growth.In this work,we demonstrate that multilayer graphene,which is complementary metal–oxide–semiconductor compatible and epitaxially growable at the wafer scale,is applicable for orbital angular momentum detection in the mid-infrared region.Using a multilayer graphene photodetector with a designed U-shaped electrode geometry,we demonstrate that the topological charge of orbital angular momentum can be detected directly through the orbital photogalvanic effect and that the orbital angular momentum recognition capability of multilayer graphene is an order of magnitude greater than that of TaIrTe4.We found that the detection capability of multilayer graphene is enabled by the enhanced orbital photogalvanic effect response due to the reduced dimensionality and scattering rate.Our work opens a new technical route to improve orbital angular momentum recognition capability and is immediately applicable for large-scale integration of ambient stable,midinfrared direct orbital angular momentum photodetection devices.展开更多
In the burgeoning field of light-matter interactions,angular momentum has emerged as a pivotal factor,driving innovative research directions.This study delves into the interaction dynamics between vortex lights and an...In the burgeoning field of light-matter interactions,angular momentum has emerged as a pivotal factor,driving innovative research directions.This study delves into the interaction dynamics between vortex lights and an electromagnetically induced transparency(EIT)medium,with a primary focus on elucidating the underlying mechanism of angular momentum transfer.Through comprehensive theoretical analysis and numerical simulations,it is demonstrated that when the probe field carries orbital angular momentum(OAM),the dispersion and absorption characteristics of the EIT medium undergo periodic modulation.This modulation is intricately determined by the azimuthal phase and topological charge of the beam.Notably,the OAM in the driving field exerts no such influence on the medium’s properties.Leveraging vortex phase plates(VPPs)or spatial light modulators(SLMs)to manipulate the tunable OAM enables dynamic control over the EIT effect.This breakthrough not only deepens our understanding of light-matter interactions at the quantum level but also unlocks new avenues for high-dimensional quantum information processing and advanced optical communication technologies.展开更多
We consider the optical rotation of the polarization of a linearly polarized probe field passing through an M-type atomic system by using the interaction between two vortex control fields and optical transitions. We i...We consider the optical rotation of the polarization of a linearly polarized probe field passing through an M-type atomic system by using the interaction between two vortex control fields and optical transitions. We investigate theoretically to generate the spatially dependent structured light with the atoms acting as a spatially varying circular birefringent medium. We show that the polarization and intensity distributions of the vector beam spatially vary by changing the orbital angular momentum (OAM) of the vortex control field.展开更多
Optical metrology is a well-established subject,dating back to early interferometry techniques utilizing light's linear momentum through fringes.In recent years,significant interest has arisen in using vortex ligh...Optical metrology is a well-established subject,dating back to early interferometry techniques utilizing light's linear momentum through fringes.In recent years,significant interest has arisen in using vortex light with orbital angular momentum(OAM),where the phase twists around a singular vortex in space or time.This has expanded metrology's boundaries to encompass highly sensitive chiral interactions between light and matter,three-dimensional motion detection via linear and rotational Doppler effects,and modal approaches surpassing the resolution limit for improved profling and quantification.The intricate structure of vortex light,combined with the integration of artifcial intelligence into optical metrology,unlocks new paradigms for expanding measurement frameworks through additional degrees of freedom,offering the potential for more effcient and accurate sensing and metrological advancements.This review aims to provide a comprehensive overview of recent advances and future trends in optical metrology with structured light,specifically focusing on how utilizing vortex beams has revolutionized metrology and remote sensing,transitioning from classical to quantum approaches.展开更多
Metasurfaces offer exceptional capabilities for controlling electromagnetic waves,enabling the realization of unique electromagnetic properties.As communication technology continues to evolve,metasurfaces present prom...Metasurfaces offer exceptional capabilities for controlling electromagnetic waves,enabling the realization of unique electromagnetic properties.As communication technology continues to evolve,metasurfaces present promising applications in wireless communications.This paper reviews the latest advancements in metasurface research within the communication sector,explores metasurface-based wireless relay technologies,and summarizes various wireless communication methods employing different types of metasurfaces across diverse modulation schemes.This paper provides a detailed discussion on the design of wireless communication systems based on coding metasurfaces to simplify transmitter architecture,as well as the development of intelligent coding metasurfaces in the communication field.It also elaborates on the application of vector vortex light fields in metasurface communication.Finally,it offers a forward-looking perspective on wireless communication systems that incorporate coded metasurfaces.This review aims to furnish researchers with a thorough understanding of the current state and future directions of coded metasurface applications in communications.展开更多
Listed examples of virus transmission epidemics that can be strongly transmitted through the air<span "=""> </span><span style="font-family:Verdana;">caused by sunspot change...Listed examples of virus transmission epidemics that can be strongly transmitted through the air<span "=""> </span><span style="font-family:Verdana;">caused by sunspot change cycle</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">analyzed the mechanism that promotes the generation of new viruses. From the schematic diagram of the changes in the combined force of the hydrodynamic effect of the sun sweeping the earth and the sweeping force, </span><span style="font-family:Verdana;">we </span><span style="font-family:Verdana;">obtain the </span><span style="font-family:Verdana;">places that are prone to light vortices are 30 degrees north latitude and 30 degrees</span><span "=""> </span><span style="font-family:Verdana;">south latitude on the east coast of the mainland creatively</span><span style="font-family:Verdana;">. </span><span style="font-family:Verdana;">The curved continental lines are perfect, the range of the light vortex generated is more obviously, and the effect is stronger. And the curved continental lines are perfect, the range of the light vortex generated is more obviously, and the effect is stronger. It is inferred that the light vortex produces the special amplified energy so</span><span style="font-family:Verdana;"> that can</span><span style="font-family:Verdana;"> make the virus mutate to produce a new highly infectious novel coronavirus. The earliest known place and time of the novel coronavirus origin are consistent with the reasoning of the new theory. Because the radius and frequency of the light vortex are different, the resulting virus strains are also different. Moreover, the fatality rate in the light vortex area is much higher than that in the non-light vortex area, indicating that the virus</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s toxicity and lethality are higher in the light vortex area, so it can explain why Russia, India, and countries in the African equatorial region mortality are much lower than the United States, Italy, Spain and Brazil. Finally, preventive and recommended measures are proposed.</span>展开更多
基金supported by the National Natural Science Foundation of China(Grant No.62250065 and 62325401)the National Key Research and Development Program of China(Grant Nos.2021YFA1400100 and 2020YFA0308800)+2 种基金the authors also would like to thank the support from the National Natural Science Foundation of China(Grant Nos.12404389,12034001,12034003 and 62227822)the Natural Science Basic Research Program of Shaanxi(Program No.2024JC-YBQN-0063)the Open Fund of the State Key Laboratory of Infrared Physics(Grant No.SITP-NLIST-ZD-2023-02).
文摘Recent conceptual demonstrations of direct photocurrent readout of light vortices have enabled the development of light orbital angular momentum-sensitive focal plane arrays and on-chip integration of orbital angular momentum detection.However,known orbital angular momentum-sensitive materials are limited to two topological Weyl Semimetals belonging to the C2v point group,namely,WTe2 and TaIrTe4.Both are fragile under ambient conditions and challenging for large-scale epitaxial growth.In this work,we demonstrate that multilayer graphene,which is complementary metal–oxide–semiconductor compatible and epitaxially growable at the wafer scale,is applicable for orbital angular momentum detection in the mid-infrared region.Using a multilayer graphene photodetector with a designed U-shaped electrode geometry,we demonstrate that the topological charge of orbital angular momentum can be detected directly through the orbital photogalvanic effect and that the orbital angular momentum recognition capability of multilayer graphene is an order of magnitude greater than that of TaIrTe4.We found that the detection capability of multilayer graphene is enabled by the enhanced orbital photogalvanic effect response due to the reduced dimensionality and scattering rate.Our work opens a new technical route to improve orbital angular momentum recognition capability and is immediately applicable for large-scale integration of ambient stable,midinfrared direct orbital angular momentum photodetection devices.
文摘In the burgeoning field of light-matter interactions,angular momentum has emerged as a pivotal factor,driving innovative research directions.This study delves into the interaction dynamics between vortex lights and an electromagnetically induced transparency(EIT)medium,with a primary focus on elucidating the underlying mechanism of angular momentum transfer.Through comprehensive theoretical analysis and numerical simulations,it is demonstrated that when the probe field carries orbital angular momentum(OAM),the dispersion and absorption characteristics of the EIT medium undergo periodic modulation.This modulation is intricately determined by the azimuthal phase and topological charge of the beam.Notably,the OAM in the driving field exerts no such influence on the medium’s properties.Leveraging vortex phase plates(VPPs)or spatial light modulators(SLMs)to manipulate the tunable OAM enables dynamic control over the EIT effect.This breakthrough not only deepens our understanding of light-matter interactions at the quantum level but also unlocks new avenues for high-dimensional quantum information processing and advanced optical communication technologies.
文摘We consider the optical rotation of the polarization of a linearly polarized probe field passing through an M-type atomic system by using the interaction between two vortex control fields and optical transitions. We investigate theoretically to generate the spatially dependent structured light with the atoms acting as a spatially varying circular birefringent medium. We show that the polarization and intensity distributions of the vector beam spatially vary by changing the orbital angular momentum (OAM) of the vortex control field.
基金support from the 111 Project(B17035)National Natural Science Foundation of China(Grant no.U20B2059,62231021,61621005,62201613)+2 种基金Shanghai Aerospace Science and Technology Innovation support from the 111 Project(B17035)National Natural Science Foundation of China(Grant no.U20B2059,62231021,61621005,62201613)Shanghai Aerospace Science and Technology Innovation Foundation(SAST-2022-069)。
文摘Optical metrology is a well-established subject,dating back to early interferometry techniques utilizing light's linear momentum through fringes.In recent years,significant interest has arisen in using vortex light with orbital angular momentum(OAM),where the phase twists around a singular vortex in space or time.This has expanded metrology's boundaries to encompass highly sensitive chiral interactions between light and matter,three-dimensional motion detection via linear and rotational Doppler effects,and modal approaches surpassing the resolution limit for improved profling and quantification.The intricate structure of vortex light,combined with the integration of artifcial intelligence into optical metrology,unlocks new paradigms for expanding measurement frameworks through additional degrees of freedom,offering the potential for more effcient and accurate sensing and metrological advancements.This review aims to provide a comprehensive overview of recent advances and future trends in optical metrology with structured light,specifically focusing on how utilizing vortex beams has revolutionized metrology and remote sensing,transitioning from classical to quantum approaches.
基金supported in part by National Natural Science Foundation of China(U24A20307 and 62175224)in part by the science and technology innovation leading talent project of special support plan for high-level talents in Zhejiang Province(2021R52032)+2 种基金in part by the China Jiliang University Basic Research ExpensesZhejiang University Students Science and Technology Innovation Activity Plan-New Talent Plan(2024R409C054)in part by the Natural Science Foundation of Zhejiang Province under Grant(ZCLZ25F0502).
文摘Metasurfaces offer exceptional capabilities for controlling electromagnetic waves,enabling the realization of unique electromagnetic properties.As communication technology continues to evolve,metasurfaces present promising applications in wireless communications.This paper reviews the latest advancements in metasurface research within the communication sector,explores metasurface-based wireless relay technologies,and summarizes various wireless communication methods employing different types of metasurfaces across diverse modulation schemes.This paper provides a detailed discussion on the design of wireless communication systems based on coding metasurfaces to simplify transmitter architecture,as well as the development of intelligent coding metasurfaces in the communication field.It also elaborates on the application of vector vortex light fields in metasurface communication.Finally,it offers a forward-looking perspective on wireless communication systems that incorporate coded metasurfaces.This review aims to furnish researchers with a thorough understanding of the current state and future directions of coded metasurface applications in communications.
文摘Listed examples of virus transmission epidemics that can be strongly transmitted through the air<span "=""> </span><span style="font-family:Verdana;">caused by sunspot change cycle</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">analyzed the mechanism that promotes the generation of new viruses. From the schematic diagram of the changes in the combined force of the hydrodynamic effect of the sun sweeping the earth and the sweeping force, </span><span style="font-family:Verdana;">we </span><span style="font-family:Verdana;">obtain the </span><span style="font-family:Verdana;">places that are prone to light vortices are 30 degrees north latitude and 30 degrees</span><span "=""> </span><span style="font-family:Verdana;">south latitude on the east coast of the mainland creatively</span><span style="font-family:Verdana;">. </span><span style="font-family:Verdana;">The curved continental lines are perfect, the range of the light vortex generated is more obviously, and the effect is stronger. And the curved continental lines are perfect, the range of the light vortex generated is more obviously, and the effect is stronger. It is inferred that the light vortex produces the special amplified energy so</span><span style="font-family:Verdana;"> that can</span><span style="font-family:Verdana;"> make the virus mutate to produce a new highly infectious novel coronavirus. The earliest known place and time of the novel coronavirus origin are consistent with the reasoning of the new theory. Because the radius and frequency of the light vortex are different, the resulting virus strains are also different. Moreover, the fatality rate in the light vortex area is much higher than that in the non-light vortex area, indicating that the virus</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s toxicity and lethality are higher in the light vortex area, so it can explain why Russia, India, and countries in the African equatorial region mortality are much lower than the United States, Italy, Spain and Brazil. Finally, preventive and recommended measures are proposed.</span>
