Stark shift of the spectral response in quantum dots-in-a-well infrared photodetectors

Pantelis Aivaliotis, Nenad Vukmirović, Evgeny A. Zibik, John W. Cockburn, Dragan Indjin, Paul Harrison, Chris Groves, John P.R. David, Mark Hopkinson, Luke R. Wilson

Research output: Contribution to journalConference articlepeer-review

22 Citations (Scopus)


We present experimental and theoretical investigations of the bias-dependent spectral shift of the photoresponse in InAs/InxGa 1-xAs quantum-dots-in-a-well structures. Experimental results show that the wavelength response of the transition from the quantum dot ground state to quantum well states can be Stark-shifted by ∼15% by changing the applied bias between -1 V and +1 V. A theoretical model based on the 8-band k p method fits our experimental data well using realistic dot parameters. We also demonstrate an increase in the operating wavelength and a reduced bias-dependent spectral shift for samples containing dots formed by depositing less InAs during growth.

Original languageEnglish
Article number004
Pages (from-to)5537-5540
Number of pages4
JournalJournal of Physics D: Applied Physics
Issue number18
Early online date30 Aug 2007
Publication statusPublished - 21 Sep 2007
Externally publishedYes
Event25th Anniversary Meeting of the Institute of Physics Tribology Group - London, United Kingdom
Duration: 1 Feb 20061 Feb 2006
Conference number: 25


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