Dynamical Analysis of Terahertz Quantum Cascade Lasers
(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:
https://lup.lub.lu.se/record/ab6edaff-0f38-476b-bc57-38d3f300d086
- author
- Önder, Denizhan Ekin LU
- supervisor
- opponent
-
- Professor Sirtori, Carlo, Ecole Normale Superieur, Paris, Frankrike
- organization
- publishing date
- 2023
- 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}}, }