A5044858254- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Fiber Laser Technologies
- Random lasers and scattering media
- Semiconductor Quantum Structures and Devices
- Plasmonic and Surface Plasmon Research
- Mechanical and Optical Resonators
- Ga2O3 and related materials
- Nonlinear Optical Materials Studies
- Silicon Nanostructures and Photoluminescence
- Neural Networks and Reservoir Computing
- GaN-based semiconductor devices and materials
- Orbital Angular Momentum in Optics
- Metamaterials and Metasurfaces Applications
- ZnO doping and properties
- Advanced Fluorescence Microscopy Techniques
- Photorefractive and Nonlinear Optics
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Advanced Semiconductor Detectors and Materials
- Photochromic and Fluorescence Chemistry
- Laser-Matter Interactions and Applications
- Nanowire Synthesis and Applications
- Terahertz technology and applications
- Advanced Optical Imaging Technologies
Sun Yat-sen University
2017-2024
Chongqing Jiaotong University
2021
State Key Laboratory of Optoelectronic Materials and Technology
2017-2019
Shandong University
2002-2004
Shanghai Institute of Microsystem and Information Technology
2002
Chinese Academy of Sciences
2002
State Key Laboratory of Crystal Materials
2002
Polymer passivation layers can improve the open-circuit voltage of perovskite solar cells when inserted at perovskite-charge transport layer interfaces. Unfortunately, many such are poor conductors, leading to a trade-off between quality (voltage) and series resistance (fill factor, FF). Here, we introduce nanopatterned electron that overcomes this by modifying spatial distribution form nanoscale localized charge pathways through an otherwise passivated interface, thereby providing both...
The pursuit of compact lasers with low thresholds has imposed strict requirements on tight light confinements minimized radiation losses. Bound states in the continuum (BICs) have been recently demonstrated as an effective mechanism to trap light. However, most reported BIC are still bulky due absence in-plane confinement. Here, we combine BICs and photonic bandgaps realize three-dimensional confinements, referred miniaturized (mini-BICs). We demonstrate highly active mini-BIC resonators a...
The low quantum efficiency of silicon (Si) has been a long-standing challenge for scientists. Although improvement achieved in porous Si or dots, highly efficient Si-based light sources prepared by using the current fabrication technooloy chips are still being pursued. Here, we proposed strategy, which exploits intrinsic excitation carriers at high temperatures, to modify carrier dynamics nanoparticles. We designed Si/SiO
Silicon (Si) is generally considered as a poor photon emitter, and various scenarios have been proposed to improve the emission efficiency of Si. Here, we report observation burst hot electron luminescence from Si nanoparticles with diameters 150–250 nm, which triggered by exponential increase carrier density at high temperatures. We show that stable white light above threshold can be realized resonantly exciting either mirror-image-induced magnetic dipole resonance nanoparticle placed on...
Semiconductor micro/nanowire is an attractive candidate for light-emitting devices (LED), especially laser diodes, due to its ideal geometric shape, excellent optical performance, and electrical transport properties. However, the realization of single micro/nanostructure semiconductor LED or lasers still a challenge topic. In this Letter, we demonstrated feasible route fabricate electrically injection microwire (MW) devices. First, properties MW were investigated comprehensively, self-formed...
The strong light localization and long photon lifetimes in whispering gallery mode (WGM) microresonators, benefiting from a high-quality (Q) factor small volume (V), could significantly enhance light–matter interactions, enabling efficient nonlinear generation paving the way for exploring novel on-chip optical functionalities. However, leakage of energy bending losses severely limits improvement Q subwavelength WGM microresonators. Here, we demonstrated an integrated self-suspended...
Asymmetric microcavities supporting Whispering-gallery modes (WGMs) are of great significance for on-chip optical information processing. We define asymmetric on topologically curved surfaces, where the geodesic light trajectories completely reconstruct cavity mode features. The quality factors lossy chaotic and island in flat cavities can be increased by up to ~200 times space curvature. Strong weak coupling between very different origins occur when curvature brings them into resonance,...
Random lasing (RL) from self-constructed localized cavities based on micropits scatters in a single GaN microwire (MW) was investigated. The spectra and spatial resolution of RL exhibits that the modes originated different regions MW. Temperature-dependent measurement shows an excellent characteristic temperature about 52 K. In addition, dependence cavities' dimension pumping intensity profile studied by fast Fourier transform spectroscopy. For RL, optical feedback supported paths through...
Abstract The upconversion lasing through simultaneous multiphoton absorption (MPA) is a high‐order nonlinear optical process, which enables many critical applications in the fluorescence imaging probe, laser tomography, and photodynamic therapy. Herein, from microwires via six‐photon at room temperature first realized. Moreover, peak third‐harmonic generation of pumping light are observed concurrently, while temperature‐dependent spectrum elucidates essential distinction between each other....
The realization of a one-dimensional (1D) random laser (RL) by using artificially fabricated scatterers is reported in this letter, and the lasing characteristic has also been investigated comprehensively. manipulation mode 1D microwire (MW) RL can be achieved through micro-pits prepared laser-ablation technique. Well-defined sharp peaks were realized based on coherence feedback process optical waveguide. near- far-field images exhibit excellent spatial intensity distribution, stability...
Compared with conventional lasers, the random laser is realized through strong multiple scatterings in disordered gain system. In this paper, lasing (RL) one-dimensional metal surface plasmon (SP) waveguide gold-plated self-formed silicon pyramids was investigated comprehensively. Consequently, emission intensity of RL enhanced dramatically and threshold reduced significantly Au-coated Si spiky tips. Meanwhile, SP channel waveguides confined emitting light a certain direction small...
Enhancement of two-photon absorption detection in a single-microwire was demonstrated by high <italic>Q</italic>-factor whispering-cavity mode. The spatial and polarization characteristics the MW detector were investigated.
Single microbelt (MB) photodetectors with metal–semiconductor-metal structure have been demonstrated and characterized comprehensively. For single-photon absorption, the maximum responsivity of ZnO-MB photodetector can reach as high 1.4 × 105 A W−1 at 20 V bias. The results about photoresponse MB-detector reveals that two relaxation mechanisms contribute to carrier decay time. Moreover, two-photon absorption upconversion photoresponsivity in single-MB detector has also realized, which is...
Identifying strong third-order nonlinearities and low nonlinear optical losses, including photonic crystals plasmonic structure1–4, are crucial for developing optoelectronic devices nanophotonics technologies. We presented large enhancement of degenerate two-photon absorption through hexagonal cavity resonance in single-crystalline ZnO microwire involved Fabry-Perot (FP) whispering gallery mode (WGM) cavity. reported it is feasible to fabricate single photodetector. The device photocurrent...
Indium cluster in InGaN epilayers prepared with different H2-treating times was investigated. In the form of lower atom bonds evidenced by Raman spectra. Carrier lifetime found to increase time.
The realization of one-dimension random laser by using artificially fabricated scatterers in our experiment represents a novelty method towards the development manipulated-RL, which will highlight application disordered system on optoelectronic devices.
Single microbelt (MB) photodetectors with metal-semiconductor-metal (MSM) structure have been demonstrated and characterized comprehensively. For single-photon absorption, the maximum responsivity of ZnO-MB photodetector can reach as high 1.4×105 A/W at 20 V bias. The results about photoresponse MB-detector reveals that two relaxation mechanisms contribute to carrier decay time. Moreover, two-photon absorption upconversion photoresponsivity in single-MB detector has also realized, which is...
We present a metalens composed of integrated metasurfaces to achieve an optical needle with ultra-small resolution λ/5. This is promising for non-intrusive, far-field super-resolution imaging. © 2019 The Author(s)
We present a metalens composed of integrated metasurfaces to achieve an optical needle with ultra-small resolution λ/5. This is promising for non-intrusive, far-field super-resolution imaging.
We report on the growth, characterization and performance of compressively strained In/sub 0.75/Ga/sub 0.25/As/InGaAsP (/spl lambda//sub g/=1.3 /spl mu/m) MQW structures InP substrates for laser diodes in 2.0-2.1 mu/m range. These wafers were grown by gas source molecular beam epitaxy (GSMBE) first time. Both broad area ridge-waveguide structure lasers have been fabricated evaluated. The electrical optical properties high quality InGaAsP, corresponding to band wavelength 1.3 mu/m,...
Abstract The existing tunnel lighting calculation methods only consider the effect caused by direct light source and ignores reflection of flux emitted lamps inside closed pipe, which is not conducive to energy saving safety lighting.In this paper, a illumination method considering increment sidewall proposed. This based on diffuse coefficient material can characterize characteristic its surface, so as calculate illuminance road surface.Matlab software was used simulate real environment with...