Liu, Y. orcid.org/0000-0003-3034-9628, Jin, X. orcid.org/0000-0002-7205-3318, Lee, S. et al. (10 more authors) (2024) Very high gain and low noise GaAsSb/AlGaAsSb avalanche photodiodes for 1550nm detection at room temperature. In: Jiang, S. and Digonnet, M.J., (eds.) Optical Components and Materials XXI. Optical Components and Materials XXI, 27 Jan - 01 Feb 2024, San Francisco, California, United States. Society of Photo Optical Instrumentation Engineers (SPIE) ISBN 9781510670242
Abstract
The performance of the photodetector is often the primary limiting factor affecting a free space communication or LiDAR system's sensitivity. Avalanche photodiodes (APDs) can be used to improve the signal to noise ratio (SNR) compared to conventional p-i-n photodiodes. Our study focuses on demonstrating an APD operating in the eye-safe short-wave infrared (SWIR) spectrum (>1400 nm) with high multiplication (M>1200) and low excess noise (F<7 at M=200) at room temperature. This device utilizes GaAsSb and Al0.85Ga0.15AsSb in a separate absorber, charge, and multiplication (SACM) configuration on an InP substrate. Notably, this device exhibits more than 40 times improvement in maximum achievable multiplication and 6.5 times lower excess noise at M=25 compared to commercially available InGaAs/InP devices.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2024 Society of Photo Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited. |
Keywords: | Avalanche photodiode (APD); excess noise; avalanche multiplication; impact ionization; 1550 nm; AlGaAsSb |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > School of Electrical and Electronic Engineering The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 17 Jan 2025 16:16 |
Last Modified: | 17 Jan 2025 16:16 |
Status: | Published |
Publisher: | Society of Photo Optical Instrumentation Engineers (SPIE) |
Refereed: | Yes |
Identification Number: | 10.1117/12.3011687 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:220633 |