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Defect-mode and Fabry-Perot resonance induced multi-band nonreciprocal thermal radiation

Science China(Technological Sciences) 2024年第8期67卷 2405-2412页

作者： CHEN ZiHe YU ShiLv YUAN Cheng CUI XinYou HU Run School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China wuhan fiberhome fuhua electric co. Ltd.Wuhan 430074China

Acco.ding to Kirchhoff's radiation law,the spectral-directional absorptivity(α)and spectral-directional emissivity(e)of an object are widely believed to be identical,which places a fundamental limit on photonic energy co.version and *** introduction of Weyl semimetals and magneto-optical(MO)materials into photonic crystals makes it possible to violate Kirchhoff's law,but most existing work only report the unequal absorptivity and emissivity spectra in a single band,which cannot meet the requirements of most practical ***,we introduce a defect layer into the structure co.posed of one-dimensional(1D)magnetophotonic crystal and a metal layer,which realizes dual-band nonreciprocal thermal radiation under a 3-T magnetic field with an incident angle of 60°.The realization of dual-band nonreciprocal radiation is mainly due to the Fabry-Perot(FP)resonance occurring in the defect layer and the excitation of Tamm plasmon,which is proved by calculating the magnetic field *** addition,the effects of incident angle and structural parameters on nonreciprocity are also *** is more,the number of nonreciprocal bands co.ld be further increased by tuning the defect layer *** the defect layer thickness increases to 18.2μm,tri-band nonreciprocal thermal radiation is realized due to the enhanced number of defect modes in the photonic band gap and the FP resonance occurring in the defect ***,the effect of defect location on nonreciprocity is also *** present work provides a new way for the design of multi-band or even broad-band nonreciprocal thermal emitters.

关键词： Kirchhoff's law multi-band nonreciprocal thermal radiation magnetophotonic crystal Tamm plasmon defect layer Fabry-Perot resonance

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Review on developments of novel specialty fibers： performance, application and process

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Frontiers of Optoelectronics 2014年第3期7卷 338-347页

作者： Qi MO Cheng DU Wei CHEN Yili KE Tao ZHANG Rushan CHEN fiberhome Teleco.munication Technologies co. Ltd Wuhan 430074 China Accelink Technologies co. Ltd Wuhan 430074 China

This paper reviews the development progress of optical fiber, the producing and application of the specialty optical fiber in the world. Finally it states the leading technology of optical fiber of the world. Specialty optical fibers are series of optical fiber which co.ld satisfy special requirements. Recently, the rapidly growing need from fiber to the home （FTTH）, sensors, active optical link, energy co.version and delivery and fiber laser attracts researchers and optical co.panies to explore more possibilities of optical fiber and some novel specialty optical fibers were invented for the efforts. Bending insensitive optical fiber with the ability of extreme 3 mm bending diameter makes it possible to use the optical fiber as the electric wire in some extremely co.pact devices. Higher power was achieved in the fiber laser field with the development of rare earth doped fiber. Nanomaterials such as Au particles and ZnO nanostructures were utilized to extend the application in sensors and energy co.version. Pure silica design was co.mercialized to improve the radiation resistance of sensors based on fiber optics.

关键词： single mode optical fiber bending-insensitive rare earth doped fiber nano technology

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