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The study of optical gain for terahertz quantum cascade laser using density matrix method

Terahertz (THz) quantum cascade lasers (QCL) are currently increasing in popularity. It is expected to become the main source of emerging terahertz radiation technology and applications. However to produce the device within the application specification is costly and time consuming. This is because...

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Main Authors: Mohd. Akil, M. A., Akabli, K., Shaari, A., Kasmin, M. K., Othaman, Z.
Format: Article
Language:English
Published: Penerbit UTM Press 2016
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/74184/1/AmiruddinShaari2016_TheStudyofOpticalGainforTerahertz.pdf
http://eprints.utm.my/id/eprint/74184/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988422266&doi=10.11113%2fjt.v78.7392&partnerID=40&md5=0a325f5c1dc29eacd1185bd3495158fc
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spelling my.utm.741842017-11-26T03:37:06Z http://eprints.utm.my/id/eprint/74184/ The study of optical gain for terahertz quantum cascade laser using density matrix method Mohd. Akil, M. A. Akabli, K. Shaari, A. Kasmin, M. K. Othaman, Z. QC Physics Terahertz (THz) quantum cascade lasers (QCL) are currently increasing in popularity. It is expected to become the main source of emerging terahertz radiation technology and applications. However to produce the device within the application specification is costly and time consuming. This is because the manufacturing process of the superlattice growth and the device processing and testing are long and expensive processes. Thus a prediction tool is needed to overcome the problems in designing and producing THz QCL within the needed optical expectation. The density matrix method is used to calculate the performance of this device electronically and optically. The result obtained was compared to the experimental result conducted by previous researchers. The calculation result showed that the gain is 20 cm−1 when the population inversion occurs at threshold current density of 400 A cm-2. Meanwhile a negative gain or loss occurs below 350 A cm-2. As a conclusion, it is demonstrated that this method has a capability to explain the transport phenomena as well as to predict the performance of the THz QCL device design. Penerbit UTM Press 2016 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/74184/1/AmiruddinShaari2016_TheStudyofOpticalGainforTerahertz.pdf Mohd. Akil, M. A. and Akabli, K. and Shaari, A. and Kasmin, M. K. and Othaman, Z. (2016) The study of optical gain for terahertz quantum cascade laser using density matrix method. Jurnal Teknologi, 78 (9). pp. 123-128. ISSN 0127-9696 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988422266&doi=10.11113%2fjt.v78.7392&partnerID=40&md5=0a325f5c1dc29eacd1185bd3495158fc
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QC Physics
spellingShingle QC Physics
Mohd. Akil, M. A.
Akabli, K.
Shaari, A.
Kasmin, M. K.
Othaman, Z.
The study of optical gain for terahertz quantum cascade laser using density matrix method
description Terahertz (THz) quantum cascade lasers (QCL) are currently increasing in popularity. It is expected to become the main source of emerging terahertz radiation technology and applications. However to produce the device within the application specification is costly and time consuming. This is because the manufacturing process of the superlattice growth and the device processing and testing are long and expensive processes. Thus a prediction tool is needed to overcome the problems in designing and producing THz QCL within the needed optical expectation. The density matrix method is used to calculate the performance of this device electronically and optically. The result obtained was compared to the experimental result conducted by previous researchers. The calculation result showed that the gain is 20 cm−1 when the population inversion occurs at threshold current density of 400 A cm-2. Meanwhile a negative gain or loss occurs below 350 A cm-2. As a conclusion, it is demonstrated that this method has a capability to explain the transport phenomena as well as to predict the performance of the THz QCL device design.
format Article
author Mohd. Akil, M. A.
Akabli, K.
Shaari, A.
Kasmin, M. K.
Othaman, Z.
author_facet Mohd. Akil, M. A.
Akabli, K.
Shaari, A.
Kasmin, M. K.
Othaman, Z.
author_sort Mohd. Akil, M. A.
title The study of optical gain for terahertz quantum cascade laser using density matrix method
title_short The study of optical gain for terahertz quantum cascade laser using density matrix method
title_full The study of optical gain for terahertz quantum cascade laser using density matrix method
title_fullStr The study of optical gain for terahertz quantum cascade laser using density matrix method
title_full_unstemmed The study of optical gain for terahertz quantum cascade laser using density matrix method
title_sort study of optical gain for terahertz quantum cascade laser using density matrix method
publisher Penerbit UTM Press
publishDate 2016
url http://eprints.utm.my/id/eprint/74184/1/AmiruddinShaari2016_TheStudyofOpticalGainforTerahertz.pdf
http://eprints.utm.my/id/eprint/74184/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988422266&doi=10.11113%2fjt.v78.7392&partnerID=40&md5=0a325f5c1dc29eacd1185bd3495158fc
_version_ 1643656813779877888
score 13.2442

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