Miniaturized light sources at telecommunication wavelengths are essential components for on-chip optical communication systems.Here,we report the growth and fabrication of highly uniform p-i-n core-shell InGaAs/InP si...Miniaturized light sources at telecommunication wavelengths are essential components for on-chip optical communication systems.Here,we report the growth and fabrication of highly uniform p-i-n core-shell InGaAs/InP single quantum well(QW)nanowire array light emitting diodes(LEDs)with multi-wavelength and high-speed operations.Two-dimensional cathodoluminescence mapping reveals that axial and radial QWs in the nanowire structure contribute to strong emission at the wavelength of~1.35 and~1.55μm,respectively,ideal for low-loss optical communications.As a result of simultaneous contributions from both axial and radial QWs,broadband electroluminescence emission with a linewidth of 286 nm is achieved with a peak power of~17μW.A large spectral blueshift is observed with the increase of applied bias,which is ascribed to the band-filling effect based on device simulation,and enables voltage tunable multi-wavelength operation at the telecommunication wavelength range.Multi-wavelength operation is also achieved by fabricating nanowire array LEDs with different pitch sizes on the same substrate,leading to QW formation with different emission wavelengths.Furthermore,high-speed GHz-level modulation and small pixel size LED are demonstrated,showing the promise for ultrafast operation and ultracompact integration.The voltage and pitch size controlled multi-wavelength highspeed nanowire array LED presents a compact and efficient scheme for developing high-performance nanoscale light sources for future optical communication applications.展开更多
Optical metasurfaces(OMs)have emerged as promising candidates to solve the bottleneck of bulky optical elements.OMs offer a fundamentally new method of light manipulation based on scattering from resonant nanostructur...Optical metasurfaces(OMs)have emerged as promising candidates to solve the bottleneck of bulky optical elements.OMs offer a fundamentally new method of light manipulation based on scattering from resonant nanostructures rather than conventional refraction and propagation,thus offering efficient phase,polarization,and emission control.This perspective highlights state of the art OMs and provides a roadmap for future applications,including active generation,manipulation and detection of light for quantum technologies,holography and sensing.展开更多
Structuring light emission from single-photon emitters(SPEs)in multiple degrees of freedom is of great importance for quantum information processing towards higher dimensions.However,traditional control of emission fr...Structuring light emission from single-photon emitters(SPEs)in multiple degrees of freedom is of great importance for quantum information processing towards higher dimensions.However,traditional control of emission from quantum light sources relies on the use of multiple bulky optical elements or nanostructured resonators with limited functionalities,constraining the potential of multi-dimensional tailoring.Here we introduce the use of an ultrathin polarisation-beam-splitting metalens for the arbitrary structuring of quantum emission at room temperature.Owing to the complete and independent polarisation and phase control at the single meta-atom level,the designed metalens enables simultaneous mapping of quantum emission from ultra-bright defects in hexagonal boron nitride and imprinting of an arbitrary wavefront onto orthogonal polarisation states of the sources.The hybrid quantum metalens enables simultaneous manipulation of multiple degrees of freedom of a quantum light source,including directionality,polarisation,and orbital angular momentum.This could unleash the full potential of solid-state SPEs for their use as high-dimensional quantum sources for advanced quantum photonic applications.展开更多
Controlling and manipulating individual quantum systems in solids underpins the growing interest in the development of scalable quantum technologies.Recently,hexagonal boron nitride(hBN)has garnered significant attent...Controlling and manipulating individual quantum systems in solids underpins the growing interest in the development of scalable quantum technologies.Recently,hexagonal boron nitride(hBN)has garnered significant attention in quantum photonic applications due to its ability to host optically stable quantum emitters.However,the large bandgap of hBN and the lack of efficient doping inhibits electrical triggering and limits opportunities to study the electrical control of emitters.Here,we show an approach to electrically modulate quantum emitters in an hBN-graphene van der Waals heterostructure.We show that quantum emitters in hBN can be reversibly activated and modulated by applying a bias across the device.Notably,a significant number of quantum emitters are intrinsically dark and become optically active at non-zero voltages.To explain the results,we provide a heuristic electrostatic model of this unique behavior.Finally,employing these devices we demonstrate a nearly-coherent source with linewidths of~160 MHz.Our results enhance the potential of hBN for tunable solid-state quantum emitters for the growing field of quantum information science.展开更多
Diamond is a material of choice in the pursuit of integrated quantum photonic technologies.So far,the majority of photonic devices fabricated from diamond are made from(100)-oriented crystals.In this work,we demonstra...Diamond is a material of choice in the pursuit of integrated quantum photonic technologies.So far,the majority of photonic devices fabricated from diamond are made from(100)-oriented crystals.In this work,we demonstrate a methodology for the fabrication of optically active membranes from(111)-oriented diamond.We use a liftoff technique to generate membranes,followed by chemical vapor deposition of diamond in the presence of silicon to generate homogenous silicon vacancy color centers with emission properties that are superior to those in(100)-oriented diamond.We further use the diamond membranes to fabricate microring resonators with quality factors exceeding^3000.Supported by finite-difference time-domain calculations,we discuss the advantages of(111)-oriented structures as building blocks for quantum nanophotonic devices.展开更多
Epitaxial quantum dots(QDs)are high-quality semiconductor nanostructures that mimic atoms for their discrete energy levels.Developments of QDs date back to the early 1990s in quest of temperature-insensitive lasers.Si...Epitaxial quantum dots(QDs)are high-quality semiconductor nanostructures that mimic atoms for their discrete energy levels.Developments of QDs date back to the early 1990s in quest of temperature-insensitive lasers.Since then,much effort has been devoted to studying the fundamental physical phenomena observed in those quantum-confined structures.Recently,the QD community has shifted its focus onto quantum photonics applications,motivated by the rapidly developing quantum science.The most prominent application for QDs is their use as a deterministic single-photon source—a non-classical emission of light that underpins quantum computation,communication,and sensing.The field has grown substantially within the last decade,shifting from controlled growth of isolated QDs to a full integration of ultra-pure QD single photon sources with photonic nanostructures[1–6].展开更多
文摘Miniaturized light sources at telecommunication wavelengths are essential components for on-chip optical communication systems.Here,we report the growth and fabrication of highly uniform p-i-n core-shell InGaAs/InP single quantum well(QW)nanowire array light emitting diodes(LEDs)with multi-wavelength and high-speed operations.Two-dimensional cathodoluminescence mapping reveals that axial and radial QWs in the nanowire structure contribute to strong emission at the wavelength of~1.35 and~1.55μm,respectively,ideal for low-loss optical communications.As a result of simultaneous contributions from both axial and radial QWs,broadband electroluminescence emission with a linewidth of 286 nm is achieved with a peak power of~17μW.A large spectral blueshift is observed with the increase of applied bias,which is ascribed to the band-filling effect based on device simulation,and enables voltage tunable multi-wavelength operation at the telecommunication wavelength range.Multi-wavelength operation is also achieved by fabricating nanowire array LEDs with different pitch sizes on the same substrate,leading to QW formation with different emission wavelengths.Furthermore,high-speed GHz-level modulation and small pixel size LED are demonstrated,showing the promise for ultrafast operation and ultracompact integration.The voltage and pitch size controlled multi-wavelength highspeed nanowire array LED presents a compact and efficient scheme for developing high-performance nanoscale light sources for future optical communication applications.
基金the Australian Research Council via DP150103733,DP180100077,and LP170100150.
文摘Optical metasurfaces(OMs)have emerged as promising candidates to solve the bottleneck of bulky optical elements.OMs offer a fundamentally new method of light manipulation based on scattering from resonant nanostructures rather than conventional refraction and propagation,thus offering efficient phase,polarization,and emission control.This perspective highlights state of the art OMs and provides a roadmap for future applications,including active generation,manipulation and detection of light for quantum technologies,holography and sensing.
基金supported by Australian Research Council(CE200100010,DE220101085,DP220102152)the Office of Naval Research Global(N62909-22-1-2028)(I.A.)+5 种基金the POSCO-POSTECH-RIST Convergence Research Center program funded by POSCOthe Basic Science grant(SSTF-BA2102-05)funded by the Samsung Science and Technology Foundationthe National Research Foundation(NRF)grant(NRF-2022M3C1A3081312)funded by the Ministry of Science and ICT(MSIT)of the Korean governmentthe NRF Sejong Science fellowship(NRF-RS-2023-00209560)funded by the MSIT of Korea governmentthe Institute of Information&Communications Technology Planning&Evaluation(IITP)grant(No.2019-0-01906,the POSTECH Artificial Intelligence Graduate School program)funded by the MSIT of the Korean government,and the POSTECH PIURI fellowshipthe POSTECH Alchemist fellowship.
文摘Structuring light emission from single-photon emitters(SPEs)in multiple degrees of freedom is of great importance for quantum information processing towards higher dimensions.However,traditional control of emission from quantum light sources relies on the use of multiple bulky optical elements or nanostructured resonators with limited functionalities,constraining the potential of multi-dimensional tailoring.Here we introduce the use of an ultrathin polarisation-beam-splitting metalens for the arbitrary structuring of quantum emission at room temperature.Owing to the complete and independent polarisation and phase control at the single meta-atom level,the designed metalens enables simultaneous mapping of quantum emission from ultra-bright defects in hexagonal boron nitride and imprinting of an arbitrary wavefront onto orthogonal polarisation states of the sources.The hybrid quantum metalens enables simultaneous manipulation of multiple degrees of freedom of a quantum light source,including directionality,polarisation,and orbital angular momentum.This could unleash the full potential of solid-state SPEs for their use as high-dimensional quantum sources for advanced quantum photonic applications.
基金the Australian Research Council(CE200100010,DP190101058,DE190100336)the Asian Office of Aerospace Research&Development(FA2386-20-1-4014)the Office of Naval Research Global(N62909-22-1-2028).
文摘Controlling and manipulating individual quantum systems in solids underpins the growing interest in the development of scalable quantum technologies.Recently,hexagonal boron nitride(hBN)has garnered significant attention in quantum photonic applications due to its ability to host optically stable quantum emitters.However,the large bandgap of hBN and the lack of efficient doping inhibits electrical triggering and limits opportunities to study the electrical control of emitters.Here,we show an approach to electrically modulate quantum emitters in an hBN-graphene van der Waals heterostructure.We show that quantum emitters in hBN can be reversibly activated and modulated by applying a bias across the device.Notably,a significant number of quantum emitters are intrinsically dark and become optically active at non-zero voltages.To explain the results,we provide a heuristic electrostatic model of this unique behavior.Finally,employing these devices we demonstrate a nearly-coherent source with linewidths of~160 MHz.Our results enhance the potential of hBN for tunable solid-state quantum emitters for the growing field of quantum information science.
基金Office of Naval Research Global(grant N62909-18-1-2025)Research and Development(grantFA2386-17-1-4064)Australian Research Council,Grant/Award Numbers:DP180100077,DP190101058。
文摘Diamond is a material of choice in the pursuit of integrated quantum photonic technologies.So far,the majority of photonic devices fabricated from diamond are made from(100)-oriented crystals.In this work,we demonstrate a methodology for the fabrication of optically active membranes from(111)-oriented diamond.We use a liftoff technique to generate membranes,followed by chemical vapor deposition of diamond in the presence of silicon to generate homogenous silicon vacancy color centers with emission properties that are superior to those in(100)-oriented diamond.We further use the diamond membranes to fabricate microring resonators with quality factors exceeding^3000.Supported by finite-difference time-domain calculations,we discuss the advantages of(111)-oriented structures as building blocks for quantum nanophotonic devices.
文摘Epitaxial quantum dots(QDs)are high-quality semiconductor nanostructures that mimic atoms for their discrete energy levels.Developments of QDs date back to the early 1990s in quest of temperature-insensitive lasers.Since then,much effort has been devoted to studying the fundamental physical phenomena observed in those quantum-confined structures.Recently,the QD community has shifted its focus onto quantum photonics applications,motivated by the rapidly developing quantum science.The most prominent application for QDs is their use as a deterministic single-photon source—a non-classical emission of light that underpins quantum computation,communication,and sensing.The field has grown substantially within the last decade,shifting from controlled growth of isolated QDs to a full integration of ultra-pure QD single photon sources with photonic nanostructures[1–6].
