Ultrafast optical switching in Si-metasurfaces for wireless and space optical communication

K. Ch Georgiev, A. A. Trifonov, K. Z. Kamali, D. Neshev, G. Crotti, G. D. Valle, L. S. Petrov, I. Ch Buchvarov*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

We demonstrate ultra-fast all-optical switching based on the implementation of a metasurface-based laser dichroic mirror design. The crystalline silicon metasurfaces with 100 nm thickness on sapphire substrates are fabricated using established processes in Si-semiconductor industry. Under weak-pump excitation, relative transmittance changes of up to 100% are possible for characteristic times ranging from 25 to 120 ps. A carrier-driven absolute amplitude modulation of over 72% is observed at 102-120 ps relaxation times. A CW 1030 nm laser’s beam modulation for free space communication is verified in a laboratory environment.

Original languageEnglish
Pages (from-to)998-999
Number of pages2
JournalInternational Conference on Metamaterials, Photonic Crystals and Plasmonics
Publication statusPublished - 2023
Externally publishedYes
Event13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023 - Paris, France
Duration: 18 Jul 202321 Jul 2023

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