Room-temperature waveguide-coupled silicon single-photon avalanche diodes

Single photon detection is important for a wide range of low-light applications, including quantum information processing, spectroscopy, and light detection and ranging (LiDAR). A key challenge in these applications has been to integrate single-photon detection capability into photonic circuits for...

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Bibliographic Details
Published inarXiv.org
Main Authors Alperen Govdeli, Straguzzi, John N, Zheng, Yong, Lin, Yiding, Luo, Xianshu, Chua, Hongyao, Guo-Qiang Lo, Sacher, Wesley D, Poon, Joyce K S
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 25.01.2024
Subjects
Data processing
Lidar
Photon avalanches
Photonics
Photons
Quantum phenomena
Room temperature
Silicon
Visible spectrum
Waveguides
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Summary:Single photon detection is important for a wide range of low-light applications, including quantum information processing, spectroscopy, and light detection and ranging (LiDAR). A key challenge in these applications has been to integrate single-photon detection capability into photonic circuits for the realization of complex photonic microsystems. Short-wavelength (\(\lambda\) < 1.1 \(\mu\)m) integrated photonics platforms that use silicon (Si) as photodetectors offer the opportunity to achieve single-photon avalanche diodes (SPADs) that operate at or near room temperature. Here, we report the first waveguide-coupled Si SPAD. The device is monolithically integrated in a Si photonic platform and operates in the visible spectrum. The device exhibited a single photon detection efficiency of > 6% for wavelengths of 488 nm and 532 nm with an excess voltage less than 20% of the breakdown voltage. The dark count rate was below 100 kHz at room temperature, with the possibility of improving by approximately 35% by reducing the temperature to -5\(^{\circ}\)C.
ISSN:2331-8422