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7 March 2022 Transient nonlinearities in silicon nanostructures
Guan-Jie Huang, Hao-Yu Cheng, Yu-Lung Tang, Hotta Ikuto, Junichi Takahara, Kung-Hsuan Lin, Shi-Wei Chu
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Proceedings Volume PC11999, Ultrafast Phenomena and Nanophotonics XXVI; PC119990B (2022) https://doi.org/10.1117/12.2608029
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
In this study, we propose the concept of generating transient nonlinearity via nonlinear carrier lifetime variation based on Auger recombination in silicon nanostructures. The nonlinear Auger lifetime variation creates a common crossing point for all pump-probe transient traces at different pump fluences, presenting a fluence-independent property. Furthermore, we observe that sub-linear and super-linear responses exist before and after the crossing point, revealing an unconventional temporal tunability of Auger-induced transient nonlinearity. Leveraging the combination of a laser scanning microscope and pump-probe technique, these temporally transient nonlinear behaviors are applicable to spatial resolution enhancement beyond the diffraction limit.
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Guan-Jie Huang, Hao-Yu Cheng, Yu-Lung Tang, Hotta Ikuto, Junichi Takahara, Kung-Hsuan Lin, and Shi-Wei Chu "Transient nonlinearities in silicon nanostructures", Proc. SPIE PC11999, Ultrafast Phenomena and Nanophotonics XXVI, PC119990B (7 March 2022); https://doi.org/10.1117/12.2608029
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KEYWORDS
Silicon
Nanostructures
Nonlinear optics
Nanoimaging
Nanophotonics
Nonlinear response
Polarization
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