Superlattice gain in positive differential conductivity region
Winge, David O. LU ; Franckié, Martin LU and Wacker, Andreas LU
(2016)
In AIP Advances
6(4).
- Abstract
We analyze theoretically a superlattice structure proposed by A. Andronov et al. [JETP Lett. 102, 207 (2015)] to give Terahertz gain for an operation point with positive differential conductivity. Here we confirm the existence of gain and show that an optimized structure displays gain above 20 cm-1 at low temperatures, so that lasing may be observable. Comparing a variety of simulations, this gain is found to be strongly affected by elastic scattering. It is shown that the dephasing modifies the nature of the relevant states, so that the common analysis based on Wannier-Stark states is not reliable for a quantitative description of the gain in structures with extremely diagonal transitions.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/a2af8254-fdf7-4050-8e68-65c68d9376e6
- author
- Winge, David O.
LU
; Franckié, Martin
LU
and Wacker, Andreas
LU
- organization
- publishing date
- 2016-04-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- AIP Advances
- volume
- 6
- issue
- 4
- article number
- 045025
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000375845100025
- scopus:84969690074
- ISSN
- 2158-3226
- DOI
- 10.1063/1.4948538
- language
- English
- LU publication?
- yes
- id
- a2af8254-fdf7-4050-8e68-65c68d9376e6
- date added to LUP
- 2016-07-08 11:59:42
- date last changed
- 2025-01-12 08:42:01
@article{a2af8254-fdf7-4050-8e68-65c68d9376e6,
abstract = {{<p>We analyze theoretically a superlattice structure proposed by A. Andronov et al. [JETP Lett. 102, 207 (2015)] to give Terahertz gain for an operation point with positive differential conductivity. Here we confirm the existence of gain and show that an optimized structure displays gain above 20 cm<sup>-1</sup> at low temperatures, so that lasing may be observable. Comparing a variety of simulations, this gain is found to be strongly affected by elastic scattering. It is shown that the dephasing modifies the nature of the relevant states, so that the common analysis based on Wannier-Stark states is not reliable for a quantitative description of the gain in structures with extremely diagonal transitions.</p>}},
author = {{Winge, David O. and Franckié, Martin and Wacker, Andreas}},
issn = {{2158-3226}},
language = {{eng}},
month = {{04}},
number = {{4}},
publisher = {{American Institute of Physics (AIP)}},
series = {{AIP Advances}},
title = {{Superlattice gain in positive differential conductivity region}},
url = {{http://dx.doi.org/10.1063/1.4948538}},
doi = {{10.1063/1.4948538}},
volume = {{6}},
year = {{2016}},
}