Ultrasmall high efficiency all-optical switch with single silicon nanoparticle

Te-Hsin Yen; Yi-Shiou Duh; Yu-Lung Tang; Pang-Han Wu; Yusuke Nagasaki; Ikuto Hotta; Hao-Yu Cheng; Kung-Hsuan Lin; Junichi Takahara; Shi-Wei Chu

doi:10.1117/12.2582417

5 March 2021 Ultrasmall high efficiency all-optical switch with single silicon nanoparticle

Te-Hsin Yen, Yi-Shiou Duh, Yu-Lung Tang, Pang-Han Wu, Yusuke Nagasaki, Ikuto Hotta, Hao-Yu Cheng, Kung-Hsuan Lin, Junichi Takahara, Shi-Wei Chu

Author Affiliations +

Proceedings Volume 11691, Silicon Photonics XVI; 116910U (2021) https://doi.org/10.1117/12.2582417
Event: SPIE OPTO, 2021, Online Only

Abstract

In this study, we found giant photothermal nonlinearity with 𝑛₂ = 10^-1𝜇𝑚²/𝑚𝑊 in ~100𝑛𝑚 silicon nanoblocks, based on Mie-resonance enhanced absorption and efficient temperature increase via thermal insulation. Through a continuouswave pump-probe setup, we demonstrated an ultrasmall high-contrast all-optical switch with 90% modulation depth. Due to the 0.001𝜇𝑚³ small geometrical size, thermal dissipation is as fast as nanosecond, leading to modulation speed at GHz, which is much faster than other thermal optic switches. The large and fast all-optical switching could open the possibility toward high-density integrated photonic nanocircuits based entirely on silicon.

Conference Presentation

Citation Download Citation

Te-Hsin Yen, Yi-Shiou Duh, Yu-Lung Tang, Pang-Han Wu, Yusuke Nagasaki, Ikuto Hotta, Hao-Yu Cheng, Kung-Hsuan Lin, Junichi Takahara, and Shi-Wei Chu "Ultrasmall high efficiency all-optical switch with single silicon nanoparticle", Proc. SPIE 11691, Silicon Photonics XVI, 116910U (5 March 2021); https://doi.org/10.1117/12.2582417

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