Accession Number:

AD1096845

Title:

Resonant Cavity Infrared Detector with Five Quantum-well Absorber and 34% External Quantum Efficiency at 4 Micro(meters)

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Naval Research Laboratory Washington United States

Personal Author(s):

• Canedy (1),Chadwick L
• Bewlwy (1),William W
• Merritt (1),Charles D
• Kim (1),Chul S
• Kim (2),Mijin
• Warren (3),Michael V
• Jackson (1),Eric M
• Nolde (1),Jill A
• Affouda (1),C A
• Aifer (1),Edward H
• Vurgaftman (1),Igor
• Meyer (1),Jerry R

Report Date:

2019-02-01

Pagination or Media Count:

11.0

Abstract:

We report resonant-cavity infrared detectors with 34 external quantum efficiency at room temperature at the resonant wavelength of 4.0 mu m, even though the absorber consists of only five quantum wells with a total thickness of 50 nm. The full width at half maximum FWHM linewidth is 46 nm, and the peak absorption is enhanced by nearly a factor of 30 over that for a single pass through the absorber. In spite of an unfavorable Shockley-Read lifetime in the current material, the dark current density is at the level of state-of-the-art HgCdTe detectors as quantified by Rule 07. The Johnson-noise limited detectivity D at 21 degrees C is 7 x 109 cm Hz12W. We expect that future improvements in the device design and material quality will lead to higher quantum efficiency, as well as a significant reduction of the dark current density consistent with the very thin absorber.

Descriptors:

• photodetectors
• quantum efficiency
• quantum wells
• current density
• epitaxial growth
• cavity resonators
• antireflection coatings
• measurement
• bandwidth
• electron density
• coatings
• infrared detectors

Subject Categories:

• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE