Enhancing terahertz photonic spin Hall effect via optical Tamm state and the sensing application

程杰; 徐家豪; 项寅杰; 刘胜利; 迟逢逢; 李斌; 董鹏

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Enhancing terahertz photonic spin Hall effect via optical Tamm state and the sensing application

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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 enhancement of terahertz(THz)PSHE by taking advantage of the optical Tamm state(OTS)in In Sb-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 5.873×10^(4)mm/RIU and good stability.This sensor exhibits two orders of magnitude improvement compared with the similar PSHE sensor based on In Sb-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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来源
《中国物理：英文版》 |2022年第12期|229-234|共6页
作者
程杰; 徐家豪; 项寅杰; 刘胜利; 迟逢逢; 李斌; 董鹏;
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作者单位

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;

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原文格式 PDF
正文语种 chi
中图分类凝聚态物理学;
关键词
photonic spin Hall effect; optical Tamm state; InSb; gas sensor;

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5. Optical Coherence Domain Polarimetry(OCDP)Distributed Sensing System [A] . SAADI wahab . 2012

Enhancing terahertz photonic spin Hall effect via optical Tamm state and the sensing application

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