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Dynamical Analysis of Terahertz Quantum Cascade Lasers

Önder, Denizhan Ekin LU (2023)
Abstract
This thesis focuses on various aspects in terahertz quantum cascade lasers such as high temperature performances, electrical instabilities and chaos. In the first part of the thesis, an introduction to the topic and the non equilibrium Green's function package applied is given with particular emphasise on the inhomogeneous domain model and the chaos theory. In addition, new results regarding the high temperature operation of low frequency terahertz quantum cascade lasers are presented. In the second part, the related research articles are shown.

Paper I shows numerical simulations demonstrating the first autonomous terahertz quantum cascade laser exhibiting chaos.

Paper II provides a detailed analysis of the current... (More)
This thesis focuses on various aspects in terahertz quantum cascade lasers such as high temperature performances, electrical instabilities and chaos. In the first part of the thesis, an introduction to the topic and the non equilibrium Green's function package applied is given with particular emphasise on the inhomogeneous domain model and the chaos theory. In addition, new results regarding the high temperature operation of low frequency terahertz quantum cascade lasers are presented. In the second part, the related research articles are shown.

Paper I shows numerical simulations demonstrating the first autonomous terahertz quantum cascade laser exhibiting chaos.

Paper II provides a detailed analysis of the current record-holding terahertz quantum cascade lasers operating around 4 terahertz. A new design is suggested which should operates at an even higher temperature of 265 K.

Paper III analyses the spectral behaviour of the output light generated by oscillating field domains in direct cooperation with the experiment. The overall behaviour is related to the phenomenological boundary conductivity and the external capacitance. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor Sirtori, Carlo, Ecole Normale Superieur, Paris, Frankrike
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Terahertz, quantum cascade lasers, electric field domains, chaos, simulation, Fysicumarkivet A:2023:Önder
pages
140 pages
publisher
Lund University (Media-Tryck)
defense location
Rydbergsalen
defense date
2023-05-24 13:00:00
ISBN
978-91-8039-566-3
978-91-8039-567-0
project
Quantum Cascade Lasers beyond general paradigms
language
English
LU publication?
yes
id
ab6edaff-0f38-476b-bc57-38d3f300d086
date added to LUP
2023-04-17 11:56:49
date last changed
2023-05-30 15:44:16
@phdthesis{ab6edaff-0f38-476b-bc57-38d3f300d086,
  abstract     = {{This thesis focuses on various aspects in terahertz quantum cascade lasers such as high temperature performances, electrical instabilities and chaos. In the first part of the thesis, an introduction to the topic and the non equilibrium Green's function package applied is given with particular emphasise on the inhomogeneous domain model and the chaos theory. In addition, new results regarding the high temperature operation of low frequency terahertz quantum cascade lasers are presented. In the second part, the related research articles are shown. <br/><br/>Paper I shows numerical simulations demonstrating the first autonomous terahertz quantum cascade laser exhibiting chaos. <br/><br/>Paper II provides a detailed analysis of the current record-holding terahertz quantum cascade lasers operating around 4 terahertz. A new design is suggested which should operates at an even higher temperature of 265 K.<br/><br/>Paper III analyses the spectral behaviour of the output light generated by oscillating field domains in direct cooperation with the experiment.  The overall behaviour is related to the phenomenological boundary conductivity and the external capacitance.}},
  author       = {{Önder, Denizhan Ekin}},
  isbn         = {{978-91-8039-566-3}},
  keywords     = {{Terahertz; quantum cascade lasers; electric field domains; chaos; simulation; Fysicumarkivet A:2023:Önder}},
  language     = {{eng}},
  publisher    = {{Lund University (Media-Tryck)}},
  school       = {{Lund University}},
  title        = {{Dynamical Analysis of Terahertz Quantum Cascade Lasers}},
  url          = {{https://lup.lub.lu.se/search/files/144389488/Denizhan_Ekin_O_nder_WEBB.pdf}},
  year         = {{2023}},
}