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Surface phonon resonance: A new mechanism for enhancing photonic spin Hall effect and refractive index sensor |
Jie Cheng(程杰)1,†, Chenglong Wang(汪承龙)2, Yiming Li(李一铭)1, Yalin Zhang(张亚林)1, Shengli Liu(刘胜利)1, and Peng Dong(董鹏)3,‡ |
1 School of Science, Jiangsu Province Engineering Research Center of Low Dimensional Physics and New Energy, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; 2 College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; 3 School of Electrical Engineering, Research Center of Intelligent Sensor and Network Engineering Technology of Jiangsu Province, Nanjing Vocational University of Industry Technology, Nanjing 210023, China |
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Abstract Metal-based surface plasmon resonance (SPR) plays an important role in enhancing the photonic spin Hall effect (SHE) and developing sensitive optical sensors. However, the very large negative permittivities of metals limit their applications beyond the near-infrared regime. In this work, we theoretically present a new mechanism to enhance the photonic SHE by taking advantage of SiC-supported surface phonon resonance (SPhR) in the mid-infrared regime. The transverse displacement of photonic SHE is very sensitive to the wavelength of incident light and the thickness of SiC layer. Under the optimal parameter setup, the calculated largest transverse displacement of SiC-based SPhR structure reaches up to 163.8 μm, which is much larger than the condition of SPR. Moreover, an NO$_{2}$ gas sensor based on the SPhR-enhanced photonic SHE is theoretically proposed with the superior sensing performance. Both the intensity and angle sensitivity of this sensor can be effectively manipulated by varying the damping rate of SiC. The results may provide a promising paradigm to enhance the photonic SHE in the mid-infrared region and open up new opportunity of highly sensitive refractive index sensors.
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Received: 03 April 2024
Revised: 09 May 2024
Accepted manuscript online:
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PACS:
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42.25.-p
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(Wave optics)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.79.-e
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(Optical elements, devices, and systems)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12175107), the Natural Science Foundation of Nanjing Vocational University of Industry Technology (Grant No. YK22-02-08), the Qing Lan Project of Jiangsu Province, the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20230347), and the Fund from the Research Center of Industrial Perception and Intelligent Manufacturing Equipment Engineering of Jiangsu Province, China (Grant No. ZK21-05-09). |
Corresponding Authors:
Jie Cheng, Peng Dong
E-mail: chengj@njupt.edu.cn;2021101298@niit.edu.cn
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Cite this article:
Jie Cheng(程杰), Chenglong Wang(汪承龙), Yiming Li(李一铭), Yalin Zhang(张亚林), Shengli Liu(刘胜利), and Peng Dong(董鹏) Surface phonon resonance: A new mechanism for enhancing photonic spin Hall effect and refractive index sensor 2024 Chin. Phys. B 33 084201
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