【作者】 赖建军； 梁华锋； 王彬； 翟小锋；

【Author】 Jianjun Lai 1,2,Huafeng Liang 2,Bing Wang 2,Xiaofeng Zhai 2 (1 Wuhan National Laboratory for Optoelectronics,Wuhan,Hubei,430074 China) (2 College of Optoelectronic science and Engineering,Huazhong University of Science and Technology,Wuhan,Hubei,430074 China)

【机构】 武汉光电国家实验室光电材料与微纳制造研究部； 华中科技大学光电子科学与工程学院；

【摘要】 设计了一种用于窄带红外发射光源和窄带探测器的金属/介质/金属光栅的红外发射/吸收结构。采用有限差分时域方法,模拟了一维Ag/Si3N4/Ag光栅光栅的反射谱。模拟结果表明此结构对于TE模和TM模都支持很窄的中红外发射/吸收锋,在很宽的角度范围内发射/吸收中心波长处的发射率可以达到98%以上。此结构的独特发射/吸收特性来自于介质中波导模和金属表面等离子体模的激发。更多还原

【Abstract】 A novel metal-dielectric-metal grating infrared emitting/absorption structure is designed for narrow-band infrared emitters or detectors in application of spectral imaging sensors as well as gas and biomaterial absorption spectroscopy.By using finite difference time domain method,reflection spectrum of the one dimensional Ag/Si 3 N 4 /Ag grating structure is simulated.The results show that very narrow mid-infrared emitting/absorptance peak existed in this structure for both TE and TM polarizations and emittance above 98% at the central frequencies can be achieved for both polarizations over a broad emitting direction.The origin of this performance is believed to come from the excitation of waveguide mode and surface plasmon mode in this structure.更多还原