A5100376164- Advanced Semiconductor Detectors and Materials
- Orbital Angular Momentum in Optics
- Advanced Fiber Laser Technologies
- Advanced Frequency and Time Standards
- Advanced Optical Sensing Technologies
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Perovskite Materials and Applications
- Quantum Information and Cryptography
- Plasmonic and Surface Plasmon Research
- Near-Field Optical Microscopy
- Conducting polymers and applications
- Strong Light-Matter Interactions
- Advanced Measurement and Metrology Techniques
- Electrowetting and Microfluidic Technologies
- Advanced Chemical Physics Studies
- Integrated Circuits and Semiconductor Failure Analysis
- Electrohydrodynamics and Fluid Dynamics
- Optical Coherence Tomography Applications
- Ocular and Laser Science Research
- Flow Measurement and Analysis
- Microfluidic and Bio-sensing Technologies
- Semiconductor materials and interfaces
- Photonic Crystals and Applications
- Interactive and Immersive Displays
University of Science and Technology of China
2020-2025
University of Colorado Boulder
2023-2024
National Institute of Standards and Technology
2023-2024
Qilu Hospital of Shandong University
2024
Second Hospital of Shandong University
2024
University of Sheffield
2021-2024
Jiangsu University
2024
East China Normal University
2024
Max Planck Institute for Nuclear Physics
2019-2023
Peking University
2023
The spin angular momentum (SAM) of an elliptically or circularly polarized light beam can be transferred to matter drive a spinning motion. It is counterintuitive find that without SAM also cause the microparticles. Here, we demonstrate controllable birefringent microparticles via tightly focused radially vortex has no prior focusing. To this end, orbital Hall effect proposed control radial separation two components in field, and tunable transfer local achieved by manipulating twisted...
High sensitivity avalanche photodiodes (APDs) operating at eye-safe infrared wavelengths (1400–1650 nm) are essential components in many communications and sensing systems. We report the demonstration of a room temperature, ultrahigh gain ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>M</mml:mi> <mml:mo>=</mml:mo> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mn>278</mml:mn> </mml:mrow> </mml:math> , <mml:mi>λ</mml:mi> <mml:mn>1550</mml:mn> <mml:mspace...
Multiplexing multiple orbital angular momentum (OAM) modes of light has proven to be an effective way increase data capacity in fiber-optic communications. However, existing techniques for distributing the OAM rely on specially designed fibers or couplers. Direct transmission multiplexed through a long standard multimode fiber remains challenging because strong mode coupling disables demultiplexing. Here, we propose deep-learning-based approach recover scattered from channels without...
Multimode fibers (MMFs) can support a large number of spatial modes, increasing the amount transmitted information, feature that benefits fields such as endoscopic imaging or optical communications. However, transport information encoded in phase through standard MMF has not been achieved due to strong mode coupling, hindering direct data transfer using light beams endowed with orbital angular momentum (OAM). Here, we present computational field technique achieve OAM-multiplexed transmission...
Upon ionization, water forms a highly acidic radical cation H2O+· that undergoes ultrafast proton transfer (PT)-a pivotal step in radiation chemistry, initiating the production of reactive H3O+, OH[Formula: see text] radicals, and (hydrated) electron. Until recently, time scales, mechanisms, state-dependent reactivity PT could not be directly traced. Here, we investigate dimers using time-resolved ion coincidence spectroscopy applying free-electron laser. An extreme ultraviolet (XUV) pump...
Two types of dielectrophoretic liquid displays with patterned quantum dots (QDs) array for enhancing the color performance are demonstrated. QDs not only provide vivid (~136% AdobeRGB in CIE1976 space) but also greatly improve light efficiency by reducing optical loss from filters. These polarizer-free offer colors, high transmittance, wide viewing angle, and modest response time contrast ratio. They promising candidates E-book mobile display applications.
Luminescent organic small molecule DBP ultrathin layer were incorporated into the interface between perovskite and electron transport for high efficiency stability PSCs by absorption spectrum modification engineering.
Low noise avalanche photodiodes (APDs) detecting 1550 nm wavelength play a crucial role in optical communication and LiDAR systems. These APDs utilize separate absorption, charge, multiplication (SACM) architecture with an absorber for 1400–1650 detection low noise, high gain multiplier that can be independently optimized signal-to-noise ratio. Recently, GaAs0.5Sb0.5/Al0.85Ga0.15As0.56Sb0.44 SACM have demonstrated ultra-high extremely possibly improving sensitivity over Si InGaAs/InP...
The spin angular momentum (SAM) plays a significant role in light-matter interactions. It is well known that light carrying SAM can exert optical torques on micro-objects and drive rotations, but 3D rotation around an arbitrary axis remains challenging. Here, we demonstrate full control of the torque acting trapped microparticle by tailoring vectorial transfer. To this end, construct theoretical relationship between vector tightly focused field local polarization helicity incident field. In...
The schematic diagram illustrating the energy level alignment of functional layers in (a) a control PSC and (b) with presence PMMA-induced interface dipole at HTL/perovskite interface, (c) formation an dipole.
Abstract Spin‐orbit interactions (SOIs) of light in tight focusing systems have gained much attention due to the potential applications optical trapping and microscopy. SOI effects strongly affect distributions properties focal fields, which are determined by polarization spatial degrees freedom incoming light. Remarkably, structured fields exhibit phenomena with complex behaviors. Here SOIs tightly focused higher‐order Poincaré sphere beams that simultaneously contain vortex phase front...
The temperature dependence of the ionization coefficients AlAsSb has been determined from 210 K to 335 by measuring avalanche multiplication in a series three <i>p<sup>+</sup>-i-n<sup>+</sup></i> and two <i>n<sup>+</sup>-i-p<sup>+</sup></i> diodes. Both electron hole reduce at approximately same rate as increases but much less so than InAlAs or InP. This results significantly smaller breakdown voltage variation with 13 mV/K 1.55 μm thick structure...
The rising concentration of greenhouse gases, especially methane and carbon dioxide, is driving global temperature increases exacerbating the climate crisis. Monitoring these gases requires detectors that operate in extended short-wavelength infrared range (~2.4 µm), covering (1.65 µm) dioxide (2.05 wavelengths. Here, we present a high-performance linear mode avalanche photodetector (APD) with an InGaAs/GaAsSb type-II superlattice absorber AlGaAsSb multiplier, matched to InP substrates. This...
We report a novel optical encryption strategy that utilizes highly scattered wavefront of light field to encrypt the plaintext and exploits scattering medium as unique physical key. For information decryption, an imaging technique based on speckle-correlation matrix is adopted directly extract from speckles, i.e., ciphertext. The decryption relies transmission which serves In particular, different parts have absolutely TMs. Thus, even if attackers get cryptosystem repeat measurement process,...
Numerous modern technologies are reliant on the low-phase noise and exquisite timing stability of microwave signals. Substantial progress has been made in field photonics, whereby low signals generated by down-conversion ultra-stable optical references using a frequency comb. Such systems, however, constructed with bulk or fiber optics difficult to further reduce size power consumption. Our work addresses this challenge leveraging advances integrated photonics demonstrate low-noise...
Self-torque has recently been observed as a novel property of light that features time-varying orbital angular momentum (OAM) along pulse. This offers an additional degree freedom for manipulating fields and light-matter interactions on ultrafast time scales. In this work, we theoretically study the self-torque's role in modulating tightly focused reveal spin-orbit (SOIs) using time-dependent vectorial diffraction theory. It is found SOIs occur between spin (SAM), intrinsic OAM extrinsic...
The performance of the photodetector is often primary limiting factor affecting a free space communication or LiDAR system's sensitivity. Avalanche photodiodes (APDs) can be used to improve signal noise ratio (SNR) compared conventional <i>p-i-n</i> photodiodes. Our study focuses on demonstrating an APD operating in eye-safe short-wave infrared (SWIR) spectrum (>1400 nm) with high multiplication (<i>M</i>>1200) and low excess (<i>F</i><7 at <i>M</i>=200) room temperature. This...