Upgrade of GEN-930 MBE System for Epitaxial Regrowth of Antimonde Photonics Materials
Abstract
The proposed upgrade of the existing molecular beam epitaxial system will enable advanced regrowth technology within antimonide material system. The epitaxial regrowth is required whenever device heterostructure should incorporate buried features such as photonic crystals for lightwave manipulation and/or passivation layers for current confinement. Both photonic crystal and passivation layers are critical components for the development of the new generation of the high power surface emitting lasers and novel high temperature infrared photodetectors. The edge emitting GaSb-based lasers outperform all other semiconductor emitters in spectral region from 2 to 4 µm. Incorporation of the photonic crystal layer into the laser heterostructure requires nano patterning of the partially grown laser heterostructure followed by the epitaxial regrowth step. Thus fabricated photonic crystal surface emitting lasers will generate high power low divergent beams as required for variety of applications including remote sensing, free space communication and infrared countermeasures. The GaSb-based barrier photodetectors utilizing bulk and superlattice light absorbing layers can operate in mid- and long-wave infared regions of spectra serving night vision and other sensor technologies. The regrowth of the etched sidewalls of the pixel elements in the corresponding focal plane arrays will maximize the device sensitivity and uniformity. The preparation of the patterned surface for the epitaxial regrowth is the most critical task. The acquisition of the components necessary for our molecular beam epitaxial system to yield high structural and chemical purity of the regrown interfaces is proposed.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 09, 2020
- Source ID
- W911NF2010178
Entities
People
- L. Shterengas
Organizations
- Army Contracting Command
- Research Foundation for the State University of New York
- United States Army