A high-efficiency low-noise signal amplification mechanism for photodetectors

Mohammad Abu Raihan Miah; Iftikhar Ahmad Niaz; Yu-Hsin Liu; David Hall; Yu-Hwa Lo

doi:10.1117/12.2253792

20 February 2017 A high-efficiency low-noise signal amplification mechanism for photodetectors

Mohammad Abu Raihan Miah, Iftikhar Ahmad Niaz, Yu-Hsin Liu, David Hall, Yu-Hwa Lo

Proceedings Volume 10108, Silicon Photonics XII; 101080X (2017) https://doi.org/10.1117/12.2253792
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Recently we discovered a signal amplification mechanism to amplify photocurrent with high efficiency and low noise. Unlike conventional impact ionization used in avalanche photodetectors, the new amplification mechanism can produce high (>1000) gain with very low excess noise factor (<2 for Si) under very low bias voltage (3V). The new amplification mechanism offers a promising solution for light detection for Si-photonics, imaging, and sensing. Physics of this mechanism lies in two subsequent processes i) Auger excitation between mobile and highly localized electrons and ii) electron-phonon coupling. In this paper, experimental results are supported by the proposed physical model using simulations within density functional theory (DFT) framework.

Citation Download Citation

Mohammad Abu Raihan Miah, Iftikhar Ahmad Niaz, Yu-Hsin Liu, David Hall, and Yu-Hwa Lo "A high-efficiency low-noise signal amplification mechanism for photodetectors", Proc. SPIE 10108, Silicon Photonics XII, 101080X (20 February 2017); https://doi.org/10.1117/12.2253792

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