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作者： Liu ping Yang quanrang Department of Electrical Engineering Shantou University Shantou State Key Laboratory of Millimeter Waves Southeast University

ISBN: (纸本)078037486X

＜正＞E-plane circulator with the exact three-dimensional electromagnetic field theory is studied vet in consideration of surface *** with one ferrite disk is analysed for the first *** performances are calculated by *** the basis of this analysis,a Ka-band E-plane circulator has been developed,the experimental result is satisfactory.

关键词： E-Plane waveguide circulator surface modes optimization

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Raman spectra of ZnSe nanoparticles synthesized by thermal evaporation method

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Chinese Physics B 2004年第10期13卷 1753-1757页

作者：安辉芝赵清杜为民 InstituteofModernOptics SchoolofPhysicsPekingUniversityBeijing100871China

ZnSe nanoparticles were synthesized by using a thermal evaporation method for a vapour phase reaction of zinc and selenium sources. The sample was characterized by XRD, TEM, HRTEM and Raman spectroscopy. Raman spectra of longitudinal-optical (LO) like mode was analysed by a macroscopic continuum dielectric model. Large broadening of LO-mode is homogeneous and comes from the relaxation of the phonons at the interface and contribution of *** modes give the main contribution to the asymmetry of the lineshape.

关键词： ZnSe nanoparticles Raman spectra macroscopic continuum dielectric model(MCDM) surface modes

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Improved gas sensor with air-core photonic bandgap fiber

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Frontiers of Optoelectronics 2015年第3期8卷 314-318页

作者： Saeed OLYAEE Hassan ARMAN Nano-Photonic and Optoelectronic Research Laboratory (NORLab) Faculty of Electrical and Computer Engineering Shahid Rajaee Teacher Training University Tehran 16788-15811 Iran

The propagation loss of a fiber can be increased by coupling core mode and surface mode which will deteriorate the performance of photonic bandgap fiber （PBGF）. In this paper, we presented an aircore PBGF for gas sensing applications. By designing A = 2.63 μm, d = 0.95 A, and Reore= 1.13 A, where A is the distance between the adjacent air holes, the fiber was single-mode, no surface mode was supported with fiber, and more than 90% of the optical power was confined in the core. Furthermore, with optimizing the fiber structural parameters, at wavelength of 2 = 1.55 μm that is in acetylene gas absorption line, significant relative sensitivity of 92.5%, and acceptable confinement loss of 0.09 dB/m, were simultaneously achieved.

关键词： gas sensor photonic bandgap fiber (PBGF) sensitivity surface modes air core radius confinement loss

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