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工具技术 1978年第2期 7-12页

前言在现代机械工业生产中,感应加热方法在热加工工艺中的应用,日趋广泛。这是因为它具有:加热效率高、速度快;被加热工件在加热过程中,氧化、脱碳较少;便于在生产自动线上使用等优点。近年来,可控硅

关键词： wgm 加热温度温度控制仪屏极电压控温仪光电高温计感应器毛坯感应加热电加热高频加热高频电场加热工件温度模拟电路

Abnormal Modulation of Dielectric Band Transmittance of Polystyrene Opal

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Chinese Physics Letters 2005年第8期22卷 1930-1933页

作者：胡小永龚旗煌程丙英张道中 StateKeyLaboratoryforMesoscopicPhysics DepartmentofPhysicsPekingUniversityBeijing100871 OpticalPhysicsLaboratory InstituteofPhysicsandCenterforCondensedMatterPhysicsChineseAcademyofSciencesBeijing100080

The abnormal transmittance in the dielectric band edge of a polystyrene opal is observed and analysed. The transmittance is periodically modulated and the period of modulation varies with the wavelength, which destroys the perfect structure of the photonic band gap. The transmittance modulation originates from the propagation of the low order whispering-gallery mode excited in polystyrene spheres. These results indicate that the whispering-gallery mode has a great influence on practical applications of polystyrene opal.

关键词： USA wgm Transmittan

Emerging opportunities for ultra-high Q whispering gallery mode microcavities

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Science China(Physics,Mechanics & Astronomy) 2019年第7期62卷 127-130页

作者： QingHai Song State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Shenzhen Graduate School Harbin Institute of Technology Collaborative Innovation Center of Extreme Optics Shanxi University

Whispering gallery modes (wgms) were first discovered for sound waves in the whispering gallery of St Paul’s Cathedral and explained by Rayleigh [1] in 1878. In 1961, Garrett et al.[2] applied the concept of wgms to optical systems and realized stimulated emissions in Sm2+-doped CaF2 *** then, wgms have been widely and intensively studied in a range of micro-sized systems, including microdroplets,microspheres, microtoroids, microdisks, and microtubes.

关键词： wgm Figure Emerging opportunities for ultra-high Q whispering gallery mode microcavities

Concentration sensor with multilayer thin film-coupled surface plasmon resonance

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Optoelectronics Letters 2021年第5期17卷 289-293页

作者： Bao Sen Li Hong-jing ZHENG Gai-ge Department of Electronics Engineering Nanjing Xiaozhuang UniversityNanjing211171China Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology(CICAEET) Nanjing University of Information Science&TechnologyNanjing210044China

A concentration sensor based on silver(Ag)/silica(SiO2)/zirconium anhydride(ZrO2)multilayer structure is *** dominant dips can be observed in the reflection spectrum,which correspond to different sensing ***,it is demonstrated that the coupling between the surface plasmon polariton(SPP)mode and a planar waveguide mode(wgm)leads to the Fano resonance(FR).The induced bonding hybridized modes have ultra-narrow full wave at half maximum(FWHM)as well as ultra-high quality factors(Q).We can achieve a theoretical value of the refractive index sensitivity 167 times higher than conventional surface plasmon resonance(SPR)sensors with a single metal ***,the waveguide coupling mode was examined by measuring angular spectra.A deep and sharp waveguide coupling dip was *** experimental results show that with an increase in the concentration of the fill dielectric material in the surface of the system,the resonance dip exhibits a remarkable red shift,and the measured angular sensitivity is 98.04°/RIU.

关键词： wgm SiO SPP Concentration sensor with multilayer thin film-coupled surface plasmon resonance

Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application

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Optoelectronics Letters 2021年第5期17卷 298-301页

作者： Mohd Hafiz Jali Hazli Rafis Abdul Rahim Md Ashadi Md Johari Maslinda Mat Sharif Siti Halma Johari Siddharth Thokchom Habibah Mohamed Moh Yasin Sulaiman Wadi Harun Department of Electrical Engineering University of MalayaKuala Lumpur50603Malaysia Faculty of Electrical Engineering Universiti Teknikal Malaysia MelakaMelaka76100Malaysia Faculty of Electronic and Computer Engineering Universiti Teknikal Malaysia MelakaMelaka76100Malaysia Faculty of Electrical and Electronic Engineering Technology Universiti Teknikal Malaysia MelakaMelaka76100Malaysia School of Technology Assam Don Bosco UniversityGuwahatiAssam781017India Malaysia-Japan International Institute of Technology Universiti Teknologi MalaysiaKuala Lumpur54100Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

In this letter,a humidity sensor is demonstrated by applying a whispering gallery mode(wgm)from a microsphere resonator onto the ZnO nanorods coated glass *** diameter of the microsphere was 234μm and the glass surface was coated with ZnO nanorods using the hydrothermal method at growth duration of 12 h.A significant response to humidity level ranging from 35%RH to 85%RH has been observed with the sensitivity of 0.0142 nm/%*** proposed humidity sensor has successfully employed to enhance interaction between the whispering gallery mode evanescent and surrounds analyte with the assistance of ZnO nanorods coated glass.

关键词： wgm ZnO Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application

Simulating robust far-field coupling to traveling waves in large three-dimensional nanostructured high-Q microresonators

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Photonics Research 2019年第9期7卷 967-976页

作者： LEI CHEN CHENG LI YU-MIN LIU JUDITH SU EUAN MCLEOD State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing100876China College of Optical Sciences University of ArizonaTucsonArizona85721USA Department of Biomedical Engineering University of ArizonaTucsonArizona85721USA

Ultra-high quality(Q) whispering gallery mode(wgm) microtoroid optical resonators have demonstrated highly sensitive biomolecular detection down to the single molecule limit;however, the lack of a robust coupling method has prevented their widespread adoption outside the laboratory. We demonstrate through simulation that a phased array of nanorods can enable free-space coupling of light both into and out of a microtoroid while maintaining a high Q. To simulate large nanostructured wgm resonators, we developed a new approach known as FloWBEM,which is an efficient and compact 3D wedge model with custom boundary conditions that accurately simulate the resonant Fano interference between the traveling wgm waves and a nanorod array. Depending on the excitation conditions, we find loaded Q factors of the driven system as high as 2.1 × 10~7 and signal-to-background ratios as high as 3.86%, greater than the noise levels of many commercial detectors. These results can drive future experimental implementation.

关键词： domain Simulating robust far-field coupling to traveling waves in large three-dimensional nanostructured high-Q microresonators wgm

Whispering-gallery mode lasing from polymer microsphere for humidity sensing

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Chinese Optics Letters 2018年第8期16卷 45-49页

作者： Wei Xu Chunxiang Xu Feifei Qin Yaqi Shan Zhu Zhu Ye Zhu State Key Laboratory of Bioelectronies School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China SchooI of Chemistry and Chemical Engi~2eering Southeast University Nanjing 211189 China

Microlasers based on high quality （Q） whispering-gallery mode （wgm） resonance are pronfising low threshold laser sources for bio-sensing and imaging applications. In this Letter, dye-doped polymer microspheres were fabricated by a controlling emulsion solvent evaporation method. wgm lasing with low threshold and high Q factors was realized in an individual microsphere under femtosecond laser pumping. The slight change of environmental relative humidity （RH） can be monitored by measuring the shift of the lasing modes at tile ex- posure of water molecules, which dcmonstrates the sensitivity is as high as 6 pm/RH%. The results would offer an insight into employing microlasers as sensors.

关键词： Whispering-gallery mode lasing from polymer microsphere for humidity sensing wgm

Dark mode plasmonic optical microcavity biochemical sensor

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Photonics Research 2019年第8期7卷 939-947页

作者： CHENG LI LEI CHEN EUAN MCLEOD JUDITH SU College of Optical Sciences University of ArizonaTucsonArizona85721USA State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing100876China Department of Biomedical Engineering University of ArizonaTucsonArizona85721USA

Whispering gallery mode(wgm) microtoroid optical resonators have been effectively used to sense low concentrations of biomolecules down to the single molecule limit. Optical wgm biochemical sensors such as the microtoroid operate by tracking changes in resonant frequency as particles enter the evanescent near field of the ***, gold nanoparticles have been coupled to wgm resonators to increase the magnitude of resonance shifts via plasmonic enhancement of the electric field. However, this approach results in increased scattering from the wgm, which degrades its quality(Q) factor, making it less sensitive to extremely small frequency shifts caused by small molecules or protein conformational changes. Here, we show using simulation that precisely positioned trimer gold nanostructures generate dark modes that suppress radiation loss and can achieve high (> 10~6) Q with an electric-field intensity enhancement of 4300, which far exceeds that of a single rod(~2500 times). Through an overall evaluation of a combined enhancement factor, which includes the Q factor of the system, the sensitivity of the trimer system was improved 105× versus 84× for a single rod. Further simulations demonstrate that unlike a single rod system, the trimer is robust to orientation changes and has increased capture area. We also conduct stability tests to show that small positioning errors do not greatly impact the result.

关键词： wgm Dark mode plasmonic microcavity

UV-curable adhesive microsphere whispering gallery mode resonators

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Chinese Optics Letters 2013年第10期11卷 47-51页

作者：顾国强陈鹭剑付宏燕车凯军蔡志平许惠英 Institute of Optoelectronic Technology School of Information Science and EngineeringXiamen University Science and Technology on Electronic Information Control Laboratory

We report the fabrication and optical characterization of spherical whispering gallery mode(wgm) resonators made from ultraviolet(UV)-curable adhesive. The fabricated microspheres have good sphericity and surface smoothness, and can directly adhere to the tip of half-tapered fibers for easy manipulation. wgms are e?ciently excited in the microsphere using an evanescent field of the tapered silica optical fibers. Resonances with quality factors of 1.3×10 5 are observed. The dependence of wavelength shifts of wgm resonances on the input light powers shows that the resonant wavelength of the proposed microsphere resonators can be tuned thermo-optically.

关键词： mode UV-curable adhesive microsphere whispering gallery mode resonators wgm NOA FSR

Embedded whispering-gallery mode microsphere resonator in a tapered hollow annular core fiber

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Photonics Research 2018年第12期6卷 1124-1129页

作者： JIAWEI WANG XIAOBEI ZHANG MING YAN LEI YANG FENGYU HOU WEN SUN XIAOTONG ZHANG LIBO YUAN HAI XIAO TINGYUN WANG Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University The Key Laboratory of In-Fiber Integrated Optics Ministry of Education College of Science Harbin Engineering University School of Electronic Engineering and Automation Guilin University of Electronic Technology Department of Electrical and Computer Engineering Clemson University

We propose and demonstrate a tapered hollow annular core fiber (HACF) coupler for excitation of whisperinggallery modes (wgms) of an embedded microsphere resonator. The coupler is simply fabricated by fusion splicing of a segment of HACF with the single-mode fiber (SMF), and then improved by tapering the splicing joint to reduce the cone-apex angle. Therefore, the coupling efficiency from the SMF to the HACF is enhanced to excite various wgms via evanescent field coupling. Normal positive, negative symmetrical Lorentzian and asymmetric Fano line shapes can be obtained by varying the resonator size and location. Another interesting phenomenon is observed that a higher Q-factor mode in a lower Q-factor mode has a contrast as high as 58. Temperature sensing with good stability is also demonstrated. This embedded wgm microsphere resonator in the tapered HACF is expected to promote environmental adaptability in practical applications due to its simplicity and

关键词： Single mode fiber (SMF) cavity Embedded wgm microsphere resonator