A5100361403- Optical Coatings and Gratings
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Acoustic Wave Resonator Technologies
- Advanced Fiber Laser Technologies
- Surface Roughness and Optical Measurements
- Advanced MEMS and NEMS Technologies
- Photonic Crystals and Applications
- Advanced Semiconductor Detectors and Materials
- Manufacturing Process and Optimization
- Semiconductor Quantum Structures and Devices
- Photonic Crystal and Fiber Optics
- Advanced Measurement and Metrology Techniques
- Optical Network Technologies
- Advanced optical system design
- Advanced Sensor Technologies Research
- Mechanical and Optical Resonators
- Optical Systems and Laser Technology
- Industrial Vision Systems and Defect Detection
- Advanced Photonic Communication Systems
- Underwater Vehicles and Communication Systems
- Laser Material Processing Techniques
- Advanced Optical Imaging Technologies
- Advanced Optical Sensing Technologies
Hunan University
2024
University of Macau
2024
Beijing Institute of Technology
2024
Hubei Normal University
2023-2024
Shenyang University of Chemical Technology
2013-2024
Nanjing University of Science and Technology
2015-2024
State Key Laboratory on Integrated Optoelectronics
2024
North University of China
2023
Beihang University
2006-2023
Air Force General Hospital PLA
2023
Nontrivial capacitance behavior, including a negative (NC) effect, observed in variety of semiconductor devices, is discussed emphasizing the physical mechanism and theoretical interpretation experimental data. The correct NC can be based on analysis time-domain transient current response to small voltage step or impulse, involving self-consistent treatment all relevant effects (carrier transport, injection, recharging etc.). appears case non-monotonic positive-valued behavior...
Abstract Acoustic sensors with ultrahigh sensitivity, broadband response, and high resolution are essential for high-precision nondestructive weak signal detection technology. In this paper, based on the size effect of an ultrahigh-quality ( Q ) calcium fluoride (CaF 2 resonator, a acoustic is detected by dispersive response regime in which acoustic, elastic wave modulates geometry converted to resonance frequency shift. Through structural design sensitivity reaches 11.54 V/Pa at 10 kHz...
A new type of thin-film polarizing beam splitter (PBS) is proposed that based on the effects light interference and frustrated total internal reflection. This PBS has a significantly better performance than conventional PBS's. It nonabsorbing, broadband, wide angle high extinction ratios in both transmitted reflected beams. The principles theory this are described detail. Several PBS's designed for visible infrared spectral regions described. measured results prototype presented as well.
This article reports on a smooth surface glass etching using deep reactive ion with mixture of sulfur hexafluoride (SF6) and xenon (Xe) gases. A roughness 23 Å was achieved SF6/Xe(=1/1) 18 SF6/Ar(=1/4) under condition −390 V self-bias voltage 0.2 Pa pressure. The in the order several angstroms (5.9 Å) obtained at pressure 0.1 (SF6/Xe=1/1). average (Ra) after by SF6/Xe gas smaller than those SF6 only or SF6/Ar same mole fraction inert to SF6+inert gas. Since heavy increases physical...
An ultrasensitive fiber optic magnetic field sensor based on Fabry–Perot interferometer (FPI1) and magnetostrictive material Terfenol-D is proposed. A low fineness FPI1 made by inserting a tapered two-mode (TMF) into hollow-core (HCF). Due to the increased effective length of strain, particularly sensitive axial strain. Then, bonded FPI1. excellent stretching properties under action field, adhered also has high sensitivity field. The experiment found that in large range 9.7–92.4 mT, reached...
A method is described for the design of a thin-film all-dielectric polarizing beam splitter in which transmittances p- and s-polarized light are greater than 0.96 less 0.03, respectively, throughout spectral region extending from 0.40 to 0.70 µm, an angular field 12° measured air.
Self-mixing interferometry (SMI), as an extremely simple and compact laser range finding technique, is especially appropriate to develop minitype sensors for narrow space small precision parts. In order enhance the distance resolution performance of this we described mechanism nonlinearity in frequency under injected current tuning, proposed a reshaping method linearize attain higher scheme SMI. The proof was obtained through numerical simulation by considering change temperature carrier...
Several different thin-film design problems were solved by the comprehensive-search, gradual-evolution, minus-filter, flip-flop, and inverse-Fourier-transform, synthesis methods. In order to compare relative effectiveness of each method, results obtained computation times required these techniques for primary, intermediate, final solutions are given.
Whispering gallery mode (WGM) resonators with an ultra-high quality (Q) factor provide a new idea for high-precision underwater acoustic sensing. However, energy loss due to watertight encapsulation has become urgent problem its application. In order solve this problem, paper proposes hollowed-out array structure. The finite element simulation shows that the wave transmission is improved by 30 dB compared of flat plate Using calcium fluoride (CaF2) resonator Q 1.2 × 108 as sensitive unit,...
A flexible, software-configurable wireless receiver is implemented in 65 nm CMOS. The receive chain consists of wideband LNA and mixer, baseband amplifiers, a 7-bit 21 MS/s filtering SAR ADC. This ADC embeds highly-integrated configurable DT FIR/IIR filter to replace dedicated stages. tap length coefficients the embedded FIR are from 16 64 taps 0 6 units, respectively. Interleaving sampling processes maximizes conversion rate facilitates IIR filtering. prototype supports several standards...
A novel winding microstrip meander-line slow-wave structure (SWS) has been proposed to develop low-voltage and high-power millimeter-wave traveling-wave tube. This structure, which interacts with a round electron beam, evolves from V-shaped SWS. The electromagnetic characteristics beam-wave interaction of this are calculated in letter. As is seen the results, tubes circuit can provide over 130-W output power ranging 58 63 GHz. In addition, maximum electronic efficiency may reach 10% at 61
The architecture of imaging polarimeters with front-mounted polarizer generally used in infrared polarimetry has significant influence on the process systems and further calculation polarization information observed scenario. In this study, system is analyzed, a radiation correction method based modified model such proposed, both laboratory outdoor experiments are performed to verify its effect. Experimental results show that proposed can effectively eliminate adverse effects introduced by...
For many applications the high reflectance of conventional multilayer interference filters is undesirable. It possible to design and construct in which transmittance are independently controlled very low. However, do this it necessary employ absorbing coating materials and, as a result, reduction peak must be accepted. We describe three different methods for such coatings. Examples given number bandpass filters, neutral density cutoff an x¯(λ) tristimulus filter, all having low reflectance....
A miniaturized biconvex quartz-crystal microbalance (QCM) with large-radius spherical thickness distribution was fabricated by reactive ion etching (RIE) and photoresist reflow solvent vapor technology. conventional polishing method could not manufacture the miniaturized, spherically convex shape, which is necessary to suppress a spurious mode obtain high Q factor. Not only can shape be achieved this technology, but also miniaturization batch fabrication. The factor of QCM (80 000) two times...