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Surface Enhanced Silicon Avalanche Photodiodes for Near-IR Detection

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2002 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Radiation Monitoring Devices, Inc
44 Hunt Street Watertown, MA 02472-4699
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2002
Title: Surface Enhanced Silicon Avalanche Photodiodes for Near-IR Detection
Agency: NASA
Contract: NAS3-02187
Award Amount: $599,999.00


This Phase II SBIR builds on the exciting results demonstrated during the Phase I research. Using a new approach for enhancing the near-infrared (IR) sensitivity of high gain avalanche photodiodes (APDs), Radiation Monitoring Devices, Inc. (RMD) will develop a reliable procedure to produce APD arrays with high sensitivity at 1064 nm. This work utilizes an innovative technique to microtexture the front surface of the APD using high power, ultra-short laser pulses (100 femto-seconds). The laser processed silicon surface exhibits remarkably high absorption characteristics over a large range of wavelengths (0.4 - 3 microns). Phase I work established that this processing technique provides an enhancement in the photo-induced charge collection at near-IR wavelengths. We have further demonstrated APD responsivity > 350 A/W at 1064 nm. Evidence of silicon bandgap transformations makes this remarkable innovation extremely promising for present detector technology needs.The ultimate goal of this project is to use laser microtexturing technology to develop a high speed, high gain, low noise APD array sensor module with significantly improved near-IR response. The APD array sensor will be an extremely valuable tool for long distance optical communication and for LIDAR/LADAR applications.

Principal Investigator:

Arieh M. Karger
Principal Investigator

Business Contact:

Gerald Entine
Business Official
Small Business Information at Submission:

Radiation Monitoring Devices, Inc.
44 Hunt Street Watertown, MA 02472

EIN/Tax ID: 042546395
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No