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5 October 2023 Photo-thermo-optical nonlinearity in metal and semiconductor Mie resonators
Te-Hsin Yen, Po-Hsueh Tseng, Yu-Chieh Chen, Jhih-Jia Chen, Kentaro Nishida, Junichi Takahara, Shi-Wei Chu
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Proceedings Volume PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; PC1264803 (2023) https://doi.org/10.1117/12.2678375
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Through the combination of nanoscale Mie-resonance and photothermal/thermo-optical effect, the nonlinear index n2 of both plasmonic and metal nanostructure can be enhanced by more than three orders of magnitude. We discovered various types of nonlinearity that include saturation, suppression, and reverse saturation in nanostructures. Through a similar mechanism, we also achieved optical bistability in a nanoscale resonator with a record-low Q-factor (<10) and observed large nonlinearity with hysteretic behavior. These tunable optical nonlinearities with low requirements on sample size and shape open new possibilities for the design of photonic devices and metal/semiconductor super-resolution.
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Te-Hsin Yen, Po-Hsueh Tseng, Yu-Chieh Chen, Jhih-Jia Chen, Kentaro Nishida, Junichi Takahara, and Shi-Wei Chu "Photo-thermo-optical nonlinearity in metal and semiconductor Mie resonators", Proc. SPIE PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, PC1264803 (5 October 2023); https://doi.org/10.1117/12.2678375
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KEYWORDS
Metals
Resonators
Semiconductors
Photonic nanostructures
Scattering
Optical bistability
Photonic devices
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