Microscopic model for intersubband gain from electrically pumped quantum-dot structures
Abstract
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:
-
- Univ. of Kaiserslautern, Kaiserslautern (Germany)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). EFRC for Solid State Lighting Science (SSLS); 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)
- OSTI Identifier:
- 1183097
- Alternate Identifier(s):
- OSTI ID: 1180598
- Report Number(s):
- SAND-2014-16994J
Journal ID: ISSN 1098-0121; PRBMDO; 536944
- Grant/Contract Number:
- AC04-94AL85000
- Resource 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)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Michael, Stephan, Chow, Weng Wah, and Schneider, Han Christian. Microscopic model for intersubband gain from electrically pumped quantum-dot structures. United States: N. p., 2014.
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. https://doi.org/10.1103/PhysRevB.90.165302
Michael, Stephan, Chow, Weng Wah, and Schneider, Han Christian. Fri .
"Microscopic model for intersubband gain from electrically pumped quantum-dot structures". United States. https://doi.org/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 = {Fri Oct 03 00:00:00 EDT 2014},
month = {Fri Oct 03 00:00:00 EDT 2014}
}
Web of Science