A5060745520- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Terahertz technology and applications
- Plasmonic and Surface Plasmon Research
- Semiconductor Lasers and Optical Devices
- Solid State Laser Technologies
- Metamaterials and Metasurfaces Applications
- Laser-Matter Interactions and Applications
- Advanced Photonic Communication Systems
- Gyrotron and Vacuum Electronics Research
- Spectroscopy and Laser Applications
- Particle accelerators and beam dynamics
- Advanced Antenna and Metasurface Technologies
- Advanced Measurement and Detection Methods
- Particle Accelerators and Free-Electron Lasers
- Gas Sensing Nanomaterials and Sensors
- Laser Design and Applications
- Acoustic Wave Resonator Technologies
- Optical and Acousto-Optic Technologies
- Vibration and Dynamic Analysis
- Advanced Photocatalysis Techniques
- Advanced biosensing and bioanalysis techniques
Harbin Engineering University
2012-2024
Ministry of Industry and Information Technology
2023-2024
Beijing Aerospace Flight Control Center
2016-2023
Changcheng Institute of Metrology & Measurement
2014-2021
Jiangsu Institute of Metrology
2014-2021
Southeast University
2021
Harbin University
2020
China University of Mining and Technology
2020
Nanjing University of Information Science and Technology
2019
Xi'an University of Science and Technology
2019
We report a compact triple-band tunable perfect terahertz metamaterial absorber (TMA) at the subwavelength scale of thickness, which is composed planar metallic disk resonator array above conductive ground plane separated with liquid crystal (LC) mixture. The calculations absorption spectra demonstrate triple near-unity bands in gap plasmonic resonance coupling regime. Three frequencies exhibit continuous linear-tunability as changing refractive index LC. Remarkably, each peak absorbance...
We propose an ultrasensitive tunable terahertz (THz) sensor which consists of single-layer graphene-based gratings integrated with a Fabry-Perot cavity through numerical simulation. The excitation standing-wave graphene surface plasmon polaritons can make the probing field strongly confined in gap cavity. This provides excellent platform for and high figure-of-merit (FOM) refractive index sensing at THz band. Our full-wave electromagnetic simulations show frequency sensitivity as 4.2 per...
We propose a kind of square porous-core photonic crystal fiber (PCF) for polarization-maintaining terahertz (THz) wave guidance. An asymmetry is introduced by implementing rectangular array air holes in the porous core PCF, and ultrahigh birefringence low effective material loss (EML) can be achieved simultaneously. The properties THz propagation are analyzed numerically detail. numerical results indicate that proposed offers high 0.063 EML 0.081 cm−1 at 1 THz. Moreover, very flattened...
We report a polarization-independent integrated acousto-optical double-stage wavelength filter in X-cut, Y-propagating LiNbO/sub 3/. The device consists of combination four mode converters, TE- and TM-pass polarizer, two polarization splitters; their specific design properties are discussed. has bandwidth 1.4 nm tuning range 76 around /spl lambda/1.55 mu/m. Maximum transmission is achieved with RF drive power only 80 mW; it excites via single unidirectional transducer guided surface acoustic...
A fiber optic integrated modulation-depth-tunable modulator based on a type of hollow optical with suspended core is proposed and investigated. We synthesized magnetic fluid containing superparamagnetic Fe(3)O(4) nanoparticles encapsulated it in the as cladding layer by fusing multimode fibers. The light wavelength 632.8 nm coupled out modulating element tapering technique. Experimental results show that attenuation system can be greatly influenced only 2.0×10(-2) μL under different field...
In this Letter, we propose, to the best of our knowledge, first in-fiber optofluidic Raman surface-enhanced spectroscopy (SERS) sensor based on a microstructured hollow fiber (MHF) with suspended core. Taking advantage unique internal structure, immobilize silver nanoparticles an SERS effect in MHF by chemical bonding. The signal microfluidic sample is excited excitation light core through evanescent field. Then online can be coupled back into and detected. To demonstrate feasibility device,...
In this study, we report a highly birefringent terahertz (THz) fiber that contains rectangular air slots in the suspended core. The proposed can provide high birefringence of order 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> over wide frequency region single-mode operation. An ultrahigh 0.078, low effective material loss 0.39 dB/cm, and confinement 1.25 × xmlns:xlink="http://www.w3.org/1999/xlink">-5</sup> dB/cm are obtained...
By using specially designed three-core fiber, a microstructured light-pattern generator for sensing 3-D shapes has been demonstrated. The square or hexagon grid-interferometric fringe pattern formed by the fiber-optic interferometric grid is projected onto an object's surface. deformed containing information of surface topography captured CCD camera and analyzed 2-D Fourier transforming profilometry. use grid-interferogram technique greatly simplifies holographic interferometry system,...
We report and demonstrate an optical refractometer based on a compact fiber Michelson interferometer. The interferometer is composed of asymmetrical twin-core containing central core side core. By chemically etching segment the until exposed, effective index in etched region sensitive to environmental refractive index, which leads shift transmission spectrum experimental results show that such device has resolution more than 800 nm/refractive unit range 1.34-1.37.
We present, to the best of our knowledge, a new scheme broadband single-polarization optical fiber with high extinction ratio based on surface plasmon resonance (SPR). The double-hole Ge-doped core is modified by integrating stacks conductive and dielectric layers support SPR. strong couplings between guided modes mode can bring about serious polarization loss TM mode, while supporting efficient transmission TE in broadband. achievable be more than 25 dB covering wide telecom band 1.17–1.42...
Non-linear metamaterials hold great promise for enhanced terahertz harmonic generation. Here, we numerically investigate third-harmonic generation (THG) by exploiting the symmetry-protected bound states in continuum (BICs) graphene grating-like metamaterial. By symmetry breaking of metamaterials, BICs transform into quasi-BICs. The high Q-factor and strong localized field enhancement is achieved at quasi-BICs, leading to a boosted THG process with low incident intensity fundamental...
Multiple wavelength filtering/switching can be obtained using integrated acousto-optical filters and switches in LiNbO/sub 3/ by driving them with several RF signal simultaneously. As a consequence, interchannel interference occurs due to the interaction of acoustic waves within same mode converter resulting an intensity modulation transmitted optical waves. System performance degraded as this leads power penalty equivalent additional cross talk. We present coupled-mode analysis...