典型文献
Enhancing terahertz photonic spin Hall effect via optical Tamm state and the sensing application
文献摘要：
The photonic spin Hall effect(PSHE),characterized by two splitting beams with opposite spins,has great potential applications in nano-photonic devices,optical sensing fields,and precision metrology.We present the significant enhance-ment of terahertz(THz)PSHE by taking advantage of the optical Tamm state(OTS)in InSb-distributed Bragg reflector(DBR)structure.The spin shift of reflected light can be dynamically tuned by the structural parameters(e.g.the thickness)of the InSb-DBR structure as well as the temperature,and the maximum spin shift for a horizontally polarized incident beam at 1.1 THz can reach up to 11.15 mm.Moreover,we propose a THz gas sensing device based on the enhanced PSHE via the strong excitation of OTS for the InSb-DBR structure with a superior intensity sensitivity of 5.873×104 mm/RIU and good stability.This sensor exhibits two orders of magnitude improvement compared with the similar PSHE sensor based on InSb-supported THz long-range surface plasmon resonance.These findings may provide an alternative way for the enhanced PSHE and offer the opportunity for developing new optical sensing devices.
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作者姓名：
Jie Cheng;Jiahao Xu;Yinjie Xiang;Shengli Liu;Fengfeng Chi;Bin Li;Peng Dong
作者机构：
School of Science,New Energy Technology Engineering Laboratory of Jiangsu Province,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China;School of Electrical Engineering,Nanjing Vocational University of Industry Technology,Nanjing 210023,China
文献出处：
引用格式：
[1]Jie Cheng;Jiahao Xu;Yinjie Xiang;Shengli Liu;Fengfeng Chi;Bin Li;Peng Dong-.Enhancing terahertz photonic spin Hall effect via optical Tamm state and the sensing application)[J].中国物理B（英文版）,2022(12):397-402
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