Low-Noise, UV-to-SWIR Broadband Photodiodes for Large-Format Focal Plane Array Sensors

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$100,000.00
Award Year:
2010
Program:
SBIR
Phase:
Phase I
Contract:
NNX10CD60P
Award Id:
95420
Agency Tracking Number:
094173
Solicitation Year:
n/a
Solicitation Topic Code:
S1
Solicitation Number:
n/a
Small Business Information
119 Silvia Street, Ewing, NJ, 08628
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
824781769
Principal Investigator:
Abhay Joshi
Principal Investigator
(609) 434-1311
abhay@chipsat.com
Business Contact:
Abhay Joshi
Business Official
(609) 434-1311
abhay@chipsat.com
Research Institution:
n/a
Abstract
Broadband focal plane arrays, operating in UV-to-SWIR wavelength range, are required for atmospheric monitoring of greenhouse gases. Currently, separate image sensors are used for different spectral sub-bands: GaN for UV, Si for visible, and InGaAs for SWIR, requiring expensive component-level integration for hyper-spectral imaging. Also, the size of the InGaAs focal plane arrays is currently limited by the InP substrate area. We propose a GaAs/InGaP/InGaAs based photodiode on standard GaAs substrates for large-format (4096 x 4096) focal plane arrays with the following characteristics: (1) Wavelength = 0.25 to 2.5 micron; (2) Quantum Eficiency > 30% in UV (0.25 to 0.4 micron), > 80% in Visible (0.4 to 0.9 micron), and > 70% in IR (0.9 to 2.5 micron) subbands; (3) Photodiode Area (single element) = 15 x 15, 25 x 25, and 50 x 50 micron square; (4) RoA > 35 Ohm-cm^2 at 300K; and (5) Bandwidth > 1 GHz. Additionally, feasibility of UV-to-SWIR graded optical filters will be investigated. Based on P.I.'s experience on SCIAMACHY, this project will enable one image sensor for 8 spectroscopic channels currently orbiting on European Space Agency's ENVISAT. Also, feasibility of large-format image sensors on GaAs substrates will be demonstrated.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government