Resonant Cavity Infrared Detector with Five Quantum-well Absorber and 34% External Quantum Efficiency at 4 Micro(meters)
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 10(9) cm Hz(1/2)/W. 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2019
- Accession Number
- AD1096845
Entities
People
- C A Affouda (1)
- Chadwick L Canedy (1)
- Charles D Merritt (1)
- Chul S Kim (1)
- Edward H Aifer (1)
- Eric M Jackson (1)
- Igor Vurgaftman (1)
- Jerry R Meyer (1)
- Jill A Nolde (1)
- Michael V Warren (3)
- Mijin Kim (2)
- William W Bewlwy (1)
Organizations
- United States Naval Research Laboratory