GaN Based UV Sensors for Earth Resources Management, Phase II

Metadata Updated: May 2, 2019

This work represents the exploitation of a unique method of crystal growth -- constrained epitaxy (CE) -- in the manufacture of low-noise, multi-color UV sensors. The sensors developed here are based on the GaN/AlGaN materials system and are sensitive in the wavelength range from 250-400nm. Target responsivities are > 0.1 A/W throughout the spectral interest range. The first arrays produced under phase 1 were sensitive both to 285 and 315 nm simultaneously. Multicolor sensitivity improves background noise rejection and provides much more detailed analysis of atmospheric aerosol scattering. Noise is dominated by diode reverse leakage and is less than 10-9A/cm2. The CE manufacturing process is enabled by the recognition that surfaces on which radiation sensitive materials are grown cannot be exposed to plasma etch effluents. To overcome this limitation, a dielectric lift-off-lithography process was developed. In this process, the growth surfaces only come in contact with organic solvents and photosensitive plastics during manufacture. Initial results were obtained on a 10 x 10 diode array. In subsequent work, we intend to produce 100 x 100 arrays. In addition, it the range of attainable spectral sensitivities will be mapped out by studying the range of achievable AlGaN stoichiometries that are practically attainable.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_10132
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id f4799f86-97b2-44b6-8af9-56340c6e31f2
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2008-06-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash d52ae6d1e64cccb322120e62c703643e401e12e2
Source Schema Version 1.1

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