A5043228389- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Solid State Laser Technologies
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Photonic Crystal and Fiber Optics
- Microfluidic and Capillary Electrophoresis Applications
- Metamaterials and Metasurfaces Applications
- Photonic Crystals and Applications
- Microfluidic and Bio-sensing Technologies
- Advanced Optical Imaging Technologies
- Biosensors and Analytical Detection
- Electrowetting and Microfluidic Technologies
- Solid-state spectroscopy and crystallography
- Plasmonic and Surface Plasmon Research
- Perovskite Materials and Applications
- Topological Materials and Phenomena
- Spectroscopy and Laser Applications
- Acoustic Wave Phenomena Research
- Semiconductor Quantum Structures and Devices
- Nonlinear Photonic Systems
- Laser Design and Applications
King Abdullah University of Science and Technology
2019-2025
McMaster University
2015-2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Nanjing Normal University
2023-2024
Anhui Provincial Hospital
2020
Soochow University
2007-2018
University of Science and Technology of China
1988-2018
Harbin Medical University
2013
Engineering Link (Canada)
2012
Institute for Microstructural Sciences
2011
Flexible solar cells have a lot of market potential for application in photovoltaics integrated into buildings and wearable electronics because they are lightweight, shockproof self-powered. Silicon been successfully used large power plants. However, despite the efforts made more than 50 years, there has no notable progress development flexible silicon their rigidity1-4. Here we provide strategy fabricating large-scale, foldable wafers manufacturing cells. A textured crystalline wafer always...
A second-order topological insulator is designed on a platform of two-dimensional (2D) square lattice with all coupling coefficients having the same sign. Simulated results show existence two types nontrivial corner states in this system, one type being identified as bound continuum (BIC). The non-BIC are also found by surrounding sample trivial one, and interestingly, these perfectly confined can be gradually delocalized merge into edge tuning intersystem coefficient. Both BIC originate...
We demonstrate that multiple topological transitions can occur, with high sensitivity, by continuous change of the geometry a simple two-dimensional dielectric-frame photonic crystal consisting circular air holes. By changing radii holes and/or distance between them, normal and band gaps (PBGs) appear. The time-reversal symmetric PBGs resemble quantum spin Hall insulator electrons have two counterpropagating edge states. search for optimal transitions, i.e., sharp sensitive to geometry,...
Abstract There has been a recent surge in interest for optical satellite communication (SatCom) utilizing lasers. It is clear to see why, as SatCom capable of higher speed, lighter weight, directionality, and efficiency versus their radio-based counterparts. Research into focused on devices operating the short-wave infrared (SWIR), which due maturity commercial availability such component’s thanks significant development terrestrial telecommunications networks. However, SWIR performs poorly...
Semi-Dirac cones, characterized by linear-parabolic dispersions, endow photonic crystals with many fascinating properties, such as topological transitions and anisotropic electromagnetic responses. While most preceding investigations concentrated on two-dimensional systems, our exploration of three-dimensional comprising a cubic lattice core-shell spheroids unveils unusual dispersions in systems---dual semi-Dirac cones. The dual cones arising from pair coexisting triply degenerate modes can...
We report a design and experimental realization of three-dimensional (3D) acoustic double-zero-index medium (DZIM), whose effective mass density compressibility are nearly zero simultaneously. The DZIM is constructed from cubic lattice three orthogonally-aligned metal rods in air. combination symmetry accidental degeneracy yields four-fold degenerate point with conical dispersion at the Brillouin zone center, where material becomes 3D DZIM. Though occupying finite volume, maintains wave...
Thermal effects and their influences on kilowatt ytterbium-doped double-clad (YDDC) fiber lasers are studied through numerical modeling. Solutions to suppress the thermal in YDDC under bidirectional end pump distributed presented compared for first time. It is shown that lower operating temperature more uniform heat dissipation fibers can be obtained by optimizing arrangement of powers, absorption coefficients, lengths.
A simple method of irreversibly sealing SU-8 microfluidic channels using PDMS is reported in this paper. The based on inducing a chemical reaction between and by first generating amino groups surface N2 plasma treatment, then allowing the to react with residual epoxy at an elevated temperature. treatment can be conducted ordinary chamber high purity N2, while preserved post-exposure baking temperature no higher than 95 °C. resultant bonding create interface that withstand stress greater bulk...
The recent discovery and realizations of higher-order topological insulators enrich the fundamental studies on phases. Here, we report three-dimensional (3D) wave-steering capabilities enabled by boundary states at three different orders in a 3D phononic crystal with nontrivial bulk topology originated from synergy mirror symmetry unit cell non-symmorphic glide lattice. multitude brings diverse possibilities wave manipulations. Through judicious engineering modes, experimentally demonstrate...
Abstract We propose and demonstrate a data-driven plasmonic metascreen that efficiently absorbs incident light over wide spectral range in an ultra-thin silicon film. By embedding double-nanoring silver array within 20 nm ultrathin amorphous (a-Si) layer, we achieve significant enhancement of absorption. This arises from the interaction between resonant cavity modes localized modes, requiring precise tuning plasmon resonances to match absorption region active layer. To facilitate device...
Traditional microperforated panels (MPPs) and metamaterial-based sound absorbers rely on local resonances or multi-resonator designs, which limit their bandwidth, angular applicability, ease of fabrication. Leveraging the reciprocity theorem cavity resonances, we introduce a new class robust MPP absorbers, termed meta-MPPs, capable achieving ultrabroadband near-total absorption across range 0.37 to 10 kHz. These demonstrate average performance exceeding that traditional MPPs by over 100%,...
ObjectiveThe objective of our study was to introduce community quarantine strategy against coronavirus disease 2019 (COVID-19) in Anhui and evaluate the effectiveness based on trauma center (TC) patients.MethodThe structure illustrated. Distribution injuries among patients two TCs between January 24, 2020 February described. Multiple linear regression used analyze correlation distribution Injuries number COVID-19-associated cases.ResultsA total 757 TC hospitals were enrolled. The traffic...
We report a realization of three-dimensional (3D) electromagnetic void space. Despite occupying finite volume space, such medium is optically equivalent to an infinitesimal point where waves experience no phase accumulation. The 3D space realized by constructing all-dielectric photonic crystals that the effective permittivity and permeability vanish simultaneously, forming six-fold Dirac-like with linear dispersions at center Brillouin Zone. demonstrate, both theoretically experimentally,...
A flash lamp pumped Cr,Er:YSGG laser utilizing a langasite (LGS) crystal as an electro-optic Q-switch is proposed and demonstrated. It proved that LGS with relatively high damage threshold can be used the at 2.79 μm, 216 mJ pulse energy 14.36 ns width achieved. Its corresponding peak power of reach 15 MW, to our knowledge best result μm wavelength.
Conventional electrochemical dissolved oxygen (DO) sensors are expensive as they use platinum in their construction. In addition, these biofoul when used natural or waste water, which leads to reduced sensitivity and variable performance. Here, we solve problems by: replacing with hemin the low-cost alternative for electrocatalysing reduction reaction using silicone rubber [poly(dimethylsiloxane) (PDMS)] functionalized polyethyleneglycol (PEG) anti-biofouling gas permeable membrane provide...
Efficient cw 532 nm green-light generation is demonstrated using a periodically poled MgO:LiNbO3 ridge waveguide prepared by process that combines annealed proton exchange and precise dicing. Performance of waveguides with different widths has been investigated. The 6-μm-wide, 1.6-cm-long uncoated achieved green output power 127 mW under coupled fundamental light 250 mW. highest conversion efficiency 53%.
Abstract Based on a band engineering method, we propose theoretical prescription to create full- k -space flat in dielectric photonic crystals covering the whole Brillouin Zone. With wave functions distributed air instead of dielectrics, such represents unique mechanism for achieving dispersions beyond tight-binding picture, which can enormously reduce requirement permittivity contrast system. Finally, and numerically demonstrate application based coverage band: ultra-sensitive detection...
One of the biggest challenges in rapid low concentration bacterial detection is pre-concentration or pre-enrichment, which aims to increase bacteria and reduce sample volume for easy detection. In practical detection, large-volume water samples with a pathogenic less than 1 CFU/mL have be tested rapidly. The reported biosensors either insufficient limit limited capability handling sufficiently large sample. Therefore, high-performance automated pre-enrichment process strongly demanded this...
A new method considering both linear and nonlinear optical parameter modulation propagation loss is proposed to treat second-order interactions in media having periodic structures. Mathematical expressions are derived for difference frequency generation (DFG) compared with those second-harmonic (SHG). Wavelength conversions around 1.55 /spl mu/m, which very interesting communication systems, studied semiconductor DFG devices Semiconductor (e.g., AlGaAs) of standard device lengths (several...
A novel wavelength conversion scheme based on cascaded sum-frequency generation (SFG) and difference-frequency (DFG) is proposed demonstrated in a MgO-doped LiNbO3 quasi-phase-matched waveguide. In this scheme, two pump wavelengths are set outside the communication band. It shown that same efficiency can be achieved by use of sources with lower output power (P1, P2) compared conventional technique second-harmonic DFG single higher-power beam (P = P1 + due to larger SFG nonlinear coefficient....