Presentation
7 March 2022 Transient nonlinearities in silicon nanostructures
Author Affiliations +
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.
Conference Presentation
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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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