Polarization-free Cubic Phase GaN Ultraviolet Laser Diodes for Space-based Light Interferometry

Metadata Updated: May 2, 2019

Laser diodes have many advantages over other forms of lasers: extremely compact (<1cm in length), inexpensive and simple designs that can achieve high power, high gain, high modulation speed, high monochromaticity, and excellent reliability and longevity. Aluminum gallium nitride (AlGaN) is material of choice to emit laser in the ultraviolet range due to its wide bandgap. However, conventional AlGaN devices are fabricated on III-Nitrides' thermodynamically stable hexagonal phase, which has properties (polarization fields, poor p-doping efficiency, low hole mobility, lack of cleavage planes) that are detrimental to the characteristics of the laser.

GaN can also be engineered in its metastable cubic phase that has superior properties (polarization-free, higher hole mobility, higher gain, better p-doping efficiency, cleavage planes) for stimulated emission. My approach of growing cubic phase GaN via metalorganic chemical vapor deposition (MOCVD) on carefully patterned Si(100) mitigates the common issues (phase mixing, defective) found in epitaxy on planar substrates, such as GaAs and 3C-SiC, while adding the benefits of inexpensive substrate, scalability, and the ability to be integrated with Si devices. This proposal opens up a path to polarization-free III-Nitride laser diode devices.

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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

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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_94106
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id 983e866b-209a-4436-8057-1f4db68d3eeb
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2021-08-01
Homepage URL https://techport.nasa.gov/view/94106
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash f933655082d3b4219637fd476e158e7db5ec8615
Source Schema Version 1.1

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