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Title: Microscopic model for intersubband gain from electrically pumped quantum-dot structures

We study theoretically the performance of electrically pumped self-organized quantum dots as a gain material in the mid-infrared range at room temperature. We analyze an AlGaAs/InGaAs based structure composed of dots-in-a-well sandwiched between two quantum wells. We numerically analyze a comprehensive model by combining a many-particle approach for electronic dynamics with a realistic modeling of the electronic states in the whole structure. We investigate the gain both for quasi-equilibrium conditions and current injection. We find, comparing different structures, that steady-state gain can only be realized by an efficient extraction process, which prevents an accumulation of electrons in continuum states, that make the available scattering pathways through the quantum-dot active region too fast to sustain inversion.
Authors:
 [1] ;  [2] ;  [1]
  1. Univ. of Kaiserslautern, Kaiserslautern (Germany)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2014-16994J
Journal ID: ISSN 1098-0121; PRBMDO; 536944
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 16; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY
OSTI Identifier:
1183097
Alternate Identifier(s):
OSTI ID: 1180598

Michael, Stephan, Chow, Weng Wah, and Schneider, Han Christian. Microscopic model for intersubband gain from electrically pumped quantum-dot structures. United States: N. p., Web. doi:10.1103/PhysRevB.90.165302.
Michael, Stephan, Chow, Weng Wah, & Schneider, Han Christian. Microscopic model for intersubband gain from electrically pumped quantum-dot structures. United States. doi:10.1103/PhysRevB.90.165302.
Michael, Stephan, Chow, Weng Wah, and Schneider, Han Christian. 2014. "Microscopic model for intersubband gain from electrically pumped quantum-dot structures". United States. doi:10.1103/PhysRevB.90.165302. https://www.osti.gov/servlets/purl/1183097.
@article{osti_1183097,
title = {Microscopic model for intersubband gain from electrically pumped quantum-dot structures},
author = {Michael, Stephan and Chow, Weng Wah and Schneider, Han Christian},
abstractNote = {We study theoretically the performance of electrically pumped self-organized quantum dots as a gain material in the mid-infrared range at room temperature. We analyze an AlGaAs/InGaAs based structure composed of dots-in-a-well sandwiched between two quantum wells. We numerically analyze a comprehensive model by combining a many-particle approach for electronic dynamics with a realistic modeling of the electronic states in the whole structure. We investigate the gain both for quasi-equilibrium conditions and current injection. We find, comparing different structures, that steady-state gain can only be realized by an efficient extraction process, which prevents an accumulation of electrons in continuum states, that make the available scattering pathways through the quantum-dot active region too fast to sustain inversion.},
doi = {10.1103/PhysRevB.90.165302},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 16,
volume = 90,
place = {United States},
year = {2014},
month = {10}
}