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24 November 2023 Near-infrared plasmonic switch effect of polarization modulation induced by surface plasmon polaritons
Kaili Kuang, Qiao Wang, Han Chu, Fangjin Chang, Yutong Yang, Wei Peng
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Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129351P (2023) https://doi.org/10.1117/12.3006306
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China
Abstract
Tunability of optical responses is crucial to the development of optical switch and optical code. The methods of light intensity modulation of changing external voltage, temperature, or hydrogen exposure of devices limit the flexible and realtime control of modulation. Herein, we propose a polarization-modulated nanosystem consisting of Au grating, TiN film, and SiO2 substate. The light reflection intensity is controlled by changing the polarization angles of the incident light. By adjusting the polarization state of incident light from transverse magnetic (TM) polarization state to transverse electric (TE) polarization state, the proposed nanosystem exhibits a plasmonic switch effect with reflection from 14.2% to 86.8%, and obtains a relative modulation depth is 511.3%. The reason of the light intensity modulation is the synergistic effect of the SPPs mode at the interfaces of Au/air and TiN/air excited by TM polarized light. The proposed nanosystem enriches the methods for light intensity modulation, and has potential applications in many fields including optical switch and optical code.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Kaili Kuang, Qiao Wang, Han Chu, Fangjin Chang, Yutong Yang, and Wei Peng "Near-infrared plasmonic switch effect of polarization modulation induced by surface plasmon polaritons", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129351P (24 November 2023); https://doi.org/10.1117/12.3006306
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KEYWORDS
Polarization
Modulation
Incident light
Optical switching
Plasmonics
Optical gratings
Surface plasmon polaritons
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