Microscopic model for intersubband gain from electrically pumped quantum-dot structures
- Univ. of Kaiserslautern, Kaiserslautern (Germany)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
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.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). EFRC for Solid State Lighting Science (SSLS); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1183097
- Alternate ID(s):
- OSTI ID: 1180598
- Report Number(s):
- SAND-2014-16994J; PRBMDO; 536944
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 16; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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