liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Quantum mechanical model and simulation of GaAs/AlGaAs quantum well infrared photodetector-I optical aspects
Chalmers.
Chalmers.ORCID iD: 0000-0001-6235-7038
2002 (English)In: Hongwai yu haomibo xuebao, ISSN 1001-9014, Vol. 21, no 5, 321-326 p.Article in journal (Refereed) Published
Abstract [en]

A complete quantum mechanical model for GaAs/AlGaAs quantum well infrared photodetectors(QWIPs) is presented here. The model consisted of four parts: (1) Starting with the description of the electromagnetic field of the infrared radiation in the QWIP, effective component of the vector potential [\A(z)\] along the QWIP growth direction (z-axis) due to the optical diffraction grating was calculated. (2) From the wave transmissions and the occupations of the electronic states, it was discussed that the dark current in the QWIP is determined by the drift-diffusion current of carriers thermally excited from the ground sublevel in the quantum well to extended states above the barrier. (3) The photocurrent was investigated by the optical transition (absorption coefficient between the ground state to excited states due to the nonzero-[\A(z)\]). (4) By studying the inter-diffusion of the At atoms across the GaAs/AlGaAs heterointerfaces, the mobility of the drift-diffusion carriers in the excited states was calculated, so the measurement results of the dark current and photocurrent spectra can be explained theoretically. With the complete quantum mechanical descriptions of (1-4), QWIP device design and optimization are possible.

Place, publisher, year, edition, pages
Science Press , 2002. Vol. 21, no 5, 321-326 p.
Keyword [en]
GaAs/AlGaAs; photodetector; quantum well infrared photodetector(QWIP); quantum mechanical model
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-59162ISI: 000178836400001OAI: oai:DiVA.org:liu-59162DiVA: diva2:350182
Available from: 2010-09-10 Created: 2010-09-09 Last updated: 2017-12-12

Open Access in DiVA

No full text

Authority records BETA

Willander, Magnus

Search in DiVA

By author/editor
Willander, Magnus
In the same journal
Hongwai yu haomibo xuebao
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 84 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf