@inproceedings{7cc4413604fc48a7a64bf02ed23eec23,
title = "The linewidth enhancement factor of intersubband lasers",
abstract = "The linewidth enhancement (α-factor) of intersubband lasers was initially expected to be zero. However, nonzero values have been found in experimental investigations. This paper will give further details on how this controversy has been recently resolved by showing that counter rotating terms, usually ignored in simulations are the actual fundamental origin of nonzero α at peak gain even without inclusion of nonparabolicity and many-body effects, which are however needed to explain negative values. For laser without inversion conditions, α is found to be larger, but still at the same order of magnitude of conventional inverted medium lasers.",
keywords = "intersubband transitions, linewidth enhancement factor, many body effects, mid infrared, nonparabolicity, THz",
author = "Pereira, {M. F.}",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 19th International Conference on Transparent Optical Networks, ICTON 2017 ; Conference date: 02-07-2017 Through 06-07-2017",
year = "2017",
month = sep,
day = "1",
doi = "10.1109/ICTON.2017.8024745",
language = "British English",
series = "International Conference on Transparent Optical Networks",
publisher = "IEEE Computer Society",
booktitle = "ICTON 2017 - 19th International Conference on Transparent Optical Networks",
address = "United States",
}