A5026455646- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced MEMS and NEMS Technologies
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Force Microscopy Techniques and Applications
- Antenna Design and Analysis
- Advanced Fiber Laser Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Quantum and electron transport phenomena
- Surface and Thin Film Phenomena
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Photonic Crystals and Applications
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Ocular and Laser Science Research
- Semiconductor Quantum Structures and Devices
- Thin-Film Transistor Technologies
- Nanopore and Nanochannel Transport Studies
- Organic Light-Emitting Diodes Research
- Sensor Technology and Measurement Systems
- China's Socioeconomic Reforms and Governance
- Advanced Electron Microscopy Techniques and Applications
- Corneal surgery and disorders
Beijing Information Science & Technology University
2024
University of Electronic Science and Technology of China
2024
Wuhan University of Technology
2024
Peking University
2006-2022
King University
2022
Institute of Microelectronics
2006-2016
University of Antwerp
2009-2013
Zhengzhou University
2013
Queen Mary University of London
2012
Nanjing University
2008
Photonic chip integration would greatly benefit quantum key distribution (QKD) systems for secure communication, in terms of compactness, scalability, and well-established fabrication techniques. This study demonstrates proof concept an all-chip measurement-device-independent QKD system using integrated silicon photonic technology. The prototype generates a rate per pulse $2.923\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ over distance corresponding to 50 km standard fiber with...
Advanced multiresonance-induced thermally activated delayed fluorescence (MR-TADF) materials exhibit exceptional promise for applications in state-of-the-art organic light-emitting diodes (OLEDs) owing to their unique narrowband emissions and high luminescent efficiencies. Despite substantial progress with blue green MR-TADF materials, the development of pure-red emitters has lagged behind, thereby hindering advancement toward high-performance ultrahigh-definition OLED displays. Here, we...
Through a particularly chosen coordinate transformation, we propose an optical carpet cloak that only requires homogeneous anisotropic dielectric material. The proposed could be easily imitated and realized by alternative layers of isotropic dielectrics. To demonstrate the cloaking performance, have designed two-dimensional version uniform silicon grating structure fabricated on silicon-on-insulator wafer work as infrared cloak. has been validated through full wave electromagnetic...
The lowest energy electronic states of a donor located near semiconductor-insulator-metal interface are investigated within the effective mass approach. effect finite thickness insulator between semiconductor and metallic gate on levels is studied. obtained through variational approach, which takes into account influence all image charges that arise due to presence dielectric interfaces. We compare our results with numerical exact calculation using element technique.
In this letter, we report the experimental demonstration of a dissipative self-sustained optomechanical resonator on silicon chip by introducing coupling between vertically offset bus waveguide and racetrack optical cavity. Different from conventional blue-detuning limited self-oscillation, exhibits self-oscillation in resonance red detuning regime. The anti-damping effects are validated both numerical simulation results. with an extended working range has potential applications oscillation...
Negative impedance converters (NICs) are used to create loads that can effectively cancel the inductive properties of magnetic dipoles, resulting in active metamaterials with increased bandwidth and reduced loss for μ-near-zero (MNZ) negative-Re(μ) (MNG) media. We demonstrate techniques analyzing stability characterizing effective media loaded NICs. Specifically, we apply Nyquist criterion validate sample metamaterials. It is shown practical NIC-loaded metamaterial may maintain reduce...
In this letter, a torsional optomechanical resonator for torque sensing and mechanical frequency mixing is experimentally demonstrated. The embedded into split optical racetrack resonator, which provides high sensitivity in measuring motion. Using sensitivity, observed without regenerative displacement noise floor of the 50 fm/Hz0.5, demonstrates resonant 3.58 × 10−21 N m/Hz0.5. This demonstration will benefit potential applications on-chip RF signal modulation using resonators.
Performances of a 20-element bimorph deformable mirror are measured and closed-loop adaptive optics system, which consists the Shack-Hartmann wave-front sensor with 13×13 sub-aperture array, is established to test mirror’s capability correcting static aberrations. Experimental results show that, mean displacement response voltage discrete actuators 0.57 μm/100 V that defocus electrode 1.09 V. The hysteresis actuator limited ten percents maximal displacement. With ambient temperature...
This paper reports a Nanoelectromechanical System (NEMS) Variable Optical Attenuator (VOA) driven by the optical gradient force. The VOA is realized via waveguide based directional coupler. gap in coupler controlled an force actuator. doubly-clamped silicon beam actuator tuning wavelength of control light. signal light can be attenuated to 20% original value experiment. NEMS VOAs have merits small dimension, low power consumption and good capability for all integration, making it candidate...
This paper reports an on chip nano-optomechanical SRAM, which is integrated with light modulation system a single silicon chip. In particular, doubly-clamped beam shows bistability due to the non-linear optical gradient force generated from ring resonator. The memory states are assigned two stable deformation positions, can be switched by modulating control light's power modulator. SRAM has write/read time around 120 ns, much faster as compared traditional MEMS memory. Meanwhile, write and...
This paper presents the first experimental demonstration on microfluidic metasurface which can be individually controlled for electromagnetic modulator. The polarization state and intensity of reflected light actively modulated in a wide range frequency (86% central frequency). In addition, cross polarized reflection significantly modulated, modulation depth is nearly 100% whole range. Such proposed dynamic good candidate many practical applications such as tunable imaging system optical components.
The ground state energy and the extent of wavefunction a negatively charged donor (D − ) located near semiconductor–metal or semiconductor–dielectric interface are obtained. We apply effective mass approximation use variational two-electron that takes into account influence all image charges arise due to presence interface, as well correlation between two electrons bound donor. For D binding is enhanced for positions d > 1.5aB (aB Bohr radius) additional attraction with their images. When...
We experimentally demonstrate a silicon nano-wire actuator with nano-scale resolution and tunable actuation range. The is obtained through implementing different control regulations, including coarse tuning by the electrostatic force precision optical force. More specially, enabled can break classical NEMS 1/3 range limit, extending to an arbitrary limit in principle. This unique approach not only provides simple, non-intrusive solution air gap of devices, but also presents ultra-sensitive...
Photonic crystals have been widely applied to improve the efficiency of solar cells due its capability manipulate photon transmission. Both theoretical and experimental research shown that photonic can significantly absorption conversion cells.Solar back reflectors, intermediate window layers higher photoelectric efficiency. In this paper, state-of-the-art applications PCs in are summarized. Various fabrication methods for their associated performance discussed.
This paper presents a compact silicon-photonic based optical cross connect (OXC) driven by the gradient force. Each switch element consists of waveguide-crossing-coupled micro-ring resonator and suspended arc. The device is fabricated with standard CMOS compatible process using deep-UV 248-nm lithography double-etch technique. A switching time 0.24 μs experimentally demonstrated. proposed topology interconnections has potentials employing single wavelength channel or multiple channels,...
In this paper, a tunable THz lens array based on reconfigurable metamaterials is reported. The metamaterial consists with 40 × liquid metal microdroplets, in which the shape tuned under different air pressures. droplets are formed by injecting mercury into pre-designed microchannel network and arranged to focus incident wave. spot size can be droplet geometries. As result, constructed smallest of 0.54λ achieved. realized through simple fabrication processes, has potential applications flat...
We investigate the influence of an external perpendicular magnetic field on lowest-energy states electron bound to a donor which is located near semiconductor-metal interface. The problem treated within effective mass approach and are obtained through (1) ``numerically exact'' finite element method, (2) variational using trial wave function where all image charges that emerge due presence metallic gate taken into account. functions constructed such they reduce exponential behavior for...
A tunable multi-channel optical parametric amplifier (OPA) using difference-frequency generation (DFG) in a periodically poled lithium niobate (PPLN) waveguide is proposed and simulated. The number of the channels can be selected. working wavelength gain each channel tuned independently.
I - V and C-V curves of metal-semiconductor-metal ultraviolet detector grown with AlGaN∕GaN multi-quantum-well (MQW) interlayer are found to oscillate applied bias voltage. A simple model is proposed explain the oscillation phenomena both curves. Resonant tunneling polarization induced charges through barriers nitride based MQW structure terminated back-to-back configuration Schoktty contacts may play a key role in oscillating phenomena.
This paper reports a NEMS integrated photonic system, which integrate tunable laser, optical cross correct and variable attenuators. The system is fabricated with nano-silicon-photonic fabrication technology to various functions in single silicon circuit chip. high light-confinement capability of the nano-silicon waveguides guarantees superior performance. proposed demonstrates large tuning range (45 nm), pure single-mode properties dB side-mode-suppression ratio (SMSR)).