Low power optical bistability from quantum dots in a nanobeam photonic crystal cavity

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 isolat...

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Bibliographic Details
Published in:Applied physics letters 2022-08, Vol.121 (8)
Main Authors: Buyukkaya, Mustafa Atabey, Lee, Chang-Min, Mansoori, Ahmad, Balakrishnan, Ganesh, Waks, Edo
Format: Article
Language:English
Subjects:
Applied physics
Optical bistability
Optical coupling
Photonic crystals
Power management
Quantum dots
Room temperature
Tunable lasers
Waveguides
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0098003