21 THz quantum-cascade laser operating up to 144 K based on a scattering-assisted injection design
Abstract
A 2.1 THz quantum cascade laser (QCL) based on a scattering-assisted injection and resonant-phonon depopulation design scheme is demonstrated. The QCL is based on a four-well period implemented in the GaAs/Al0.15Ga0.85As material system. The QCL operates up to a heat-sink temperature of 144 K in pulsed-mode, which is considerably higher than that achieved for previously reported THz QCLs operating around the frequency of 2 THz. At 46 K, the threshold current-density was measured as ~ 745 A/cm2 with a peak-power output of ~10 mW. Electrically stable operation in a positive differential-resistance regime is achieved by a careful choice of design parameters. The results validate the robustness of scattering-assisted injection schemes for development of low-frequency (ν < 2.5 THz) QCLs.
- Authors:
-
- Lehigh Univ., Bethlehem, PA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1214775
- Alternate Identifier(s):
- OSTI ID: 1512904
- Report Number(s):
- SAND-2015-9049J
Journal ID: ISSN 1094-4087; OPEXFF
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Optics Express
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 15; Journal ID: ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; far infrared or terahertz; semiconductor lasers; quantum cascade
Citation Formats
Khanal, Sudeep, Reno, John L., and Kumar, Sushil. 21 THz quantum-cascade laser operating up to 144 K based on a scattering-assisted injection design. United States: N. p., 2015.
Web. doi:10.1364/OE.23.019689.
Khanal, Sudeep, Reno, John L., & Kumar, Sushil. 21 THz quantum-cascade laser operating up to 144 K based on a scattering-assisted injection design. United States. https://doi.org/10.1364/OE.23.019689
Khanal, Sudeep, Reno, John L., and Kumar, Sushil. Wed .
"21 THz quantum-cascade laser operating up to 144 K based on a scattering-assisted injection design". United States. https://doi.org/10.1364/OE.23.019689. https://www.osti.gov/servlets/purl/1214775.
@article{osti_1214775,
title = {21 THz quantum-cascade laser operating up to 144 K based on a scattering-assisted injection design},
author = {Khanal, Sudeep and Reno, John L. and Kumar, Sushil},
abstractNote = {A 2.1 THz quantum cascade laser (QCL) based on a scattering-assisted injection and resonant-phonon depopulation design scheme is demonstrated. The QCL is based on a four-well period implemented in the GaAs/Al0.15Ga0.85As material system. The QCL operates up to a heat-sink temperature of 144 K in pulsed-mode, which is considerably higher than that achieved for previously reported THz QCLs operating around the frequency of 2 THz. At 46 K, the threshold current-density was measured as ~ 745 A/cm2 with a peak-power output of ~10 mW. Electrically stable operation in a positive differential-resistance regime is achieved by a careful choice of design parameters. The results validate the robustness of scattering-assisted injection schemes for development of low-frequency (ν < 2.5 THz) QCLs.},
doi = {10.1364/OE.23.019689},
journal = {Optics Express},
number = 15,
volume = 23,
place = {United States},
year = {Wed Jul 22 00:00:00 EDT 2015},
month = {Wed Jul 22 00:00:00 EDT 2015}
}
Web of Science
Figures / Tables:
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Figures / Tables found in this record: