Mid-infrared power limiters and saturable-absorber mirrors based on GaAsSb/InGaAs intersubband polaritonic metasurfaces

Jonas Heiko Krakofsky; Michele Cotrufo; Sander Mann; Gerhard Böhm; Anna Köninger; Andrea Alù; Mikhail A. Belkin

doi:10.1117/12.2650328

17 March 2023 Mid-infrared power limiters and saturable-absorber mirrors based on GaAsSb/InGaAs intersubband polaritonic metasurfaces

Jonas Heiko Krakofsky, Michele Cotrufo, Sander Mann, Gerhard Böhm, Anna Köninger, Andrea Alù, Mikhail A. Belkin

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Proceedings Volume PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; PC124310F (2023) https://doi.org/10.1117/12.2650328
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We have recently demonstrated that mid-infrared saturable-absorber mirrors and optical power limiters can be constructed using the concept of intersubband polaritonic metasurfaces – devices in which intersubband transitions in a semiconductor heterostructure are strongly coupled with optical modes in nanoresonators. Our original demonstration produced only relatively small (~20%) variation in reflection between low and high intensity illumination. We have now optimized the metasurface design, relying on a GaAsSb-InGaAs heterostructure that provides narrower-linewidth intersubband transitions, increased doping density, and utilized transitions between excited states to significantly improve the experimentally-measured reflectivity contrast, which now spans from 80% to 10% for different illumination intensities.

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Jonas Heiko Krakofsky, Michele Cotrufo, Sander Mann, Gerhard Böhm, Anna Köninger, Andrea Alù, and Mikhail A. Belkin "Mid-infrared power limiters and saturable-absorber mirrors based on GaAsSb/InGaAs intersubband polaritonic metasurfaces", Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC124310F (17 March 2023); https://doi.org/10.1117/12.2650328

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KEYWORDS

Mid-IR

Mirrors

Heterojunctions

Optical components

Pulsed laser operation

Reflectivity

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