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Conference on Lasers and Electro-Optics

All-Optical Bistability from Quantum Dots in a Photonic Crystal Cavity

Mustafa Atabey Buyukkaya, Chang-Min Lee, Ahmad Mansoori, Ganesh Balakrishnan, Edo Waks A

Published Jan 1, 2022• 0 citations
Publisher

Abstract

We experimentally demonstrate room temperature all-optical bistability at telecom wavelengths using a nanobeam photonic crystal cavity embedded with an ensemble of quantum dots. Reflectivity measurements are performed to confirm the thermo-optic nature of the bistability.
DOI
10.1364/cleo_at.2022.jtu3b.40

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We demonstrate a low power thermally induced optical bistability at telecom wavelengths and room temperature using a nanobeam photonic crystal cavity embedded with an ensemble of quantum dots. The nanobeam photonic crystal cavity is transfer-printed onto the edge of a carrier chip for thermal isolation of the cavity with an efficient optical coupling between the nanobeam waveguide and optical setup. Reflectivity measurements performed with a tunable laser reveal the thermo-optic nature of the nonlinearity. A bistability power threshold as low as 23 μW and an on/off response contrast of 6.02 dB are achieved from a cavity with a moderately low quality factor of 2830. Our device provides optical bistability at power levels an order of magnitude lower than previous quantum-dot-based devices.
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