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Title: Split-well direct-phonon terahertz quantum cascade lasers

Abstract

We introduce a so-called “split-well direct-phonon” active region design for terahertz quantum cascade lasers (THz-QCLs). Lasers based on this scheme profit from both elimination of high-lying parasitic bound states and resonant-depopulation of the lower laser level. Negative differential resistance is observed at room temperature, which indicates that each module behaves as a clean 3-level system. This study further uses this design to investigate the impact of temperature on the dephasing time of GaAs/AlGaAs THz-QCLs.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [3]
  1. Bar-Ilan Univ., Ramat Gan, (Israel)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. 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) (SC-22). Scientific User Facilities Division; USDOE National Nuclear Security Administration (NNSA); Israel Science Foundation (ISF); German Research Foundation (DFG)
OSTI Identifier:
1529139
Alternate Identifier(s):
OSTI ID: 1512542
Report Number(s):
SAND-2019-0987J
Journal ID: ISSN 0003-6951; 671958
Grant/Contract Number:  
AC04-94AL85000; NA-0003525
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 19; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Albo, Asaf, Flores, Yuri V., Hu, Qing, and Reno, John L. Split-well direct-phonon terahertz quantum cascade lasers. United States: N. p., 2019. Web. doi:10.1063/1.5089854.
Albo, Asaf, Flores, Yuri V., Hu, Qing, & Reno, John L. Split-well direct-phonon terahertz quantum cascade lasers. United States. doi:10.1063/1.5089854.
Albo, Asaf, Flores, Yuri V., Hu, Qing, and Reno, John L. Tue . "Split-well direct-phonon terahertz quantum cascade lasers". United States. doi:10.1063/1.5089854.
@article{osti_1529139,
title = {Split-well direct-phonon terahertz quantum cascade lasers},
author = {Albo, Asaf and Flores, Yuri V. and Hu, Qing and Reno, John L.},
abstractNote = {We introduce a so-called “split-well direct-phonon” active region design for terahertz quantum cascade lasers (THz-QCLs). Lasers based on this scheme profit from both elimination of high-lying parasitic bound states and resonant-depopulation of the lower laser level. Negative differential resistance is observed at room temperature, which indicates that each module behaves as a clean 3-level system. This study further uses this design to investigate the impact of temperature on the dephasing time of GaAs/AlGaAs THz-QCLs.},
doi = {10.1063/1.5089854},
journal = {Applied Physics Letters},
number = 19,
volume = 114,
place = {United States},
year = {2019},
month = {5}
}

Journal Article:
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