Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, Vol. 93, no 20, 203512- p.Article in journal (Refereed) Published
Bias-mediated tuning of the detection wavelength within the infrared wavelength region is demonstrated for quantum dots-in-a-well and dots-on-a-well infrared photodetectors. By positioning the InAs quantum dot layer asymmetrically in an 8 nm wide In0.15Ga0.85As/GaAs quantum well, a shift in the peak detection wavelength from 8.4 to 10.3 µm was observed when reversing the polarity of the applied bias. For a dots-on-a-well structure, the peak detection wavelength was tuned from 5.4 to 8 µm with small changes in the applied bias. These tuning properties could be essential for applications such as modulators and dual-color infrared detection.
Place, publisher, year, edition, pages
American Institute of Physics , 2008. Vol. 93, no 20, 203512- p.
National CategoryOther Engineering and Technologies not elsewhere specified
IdentifiersURN: urn:nbn:se:liu:diva-15769DOI: 10.1063/1.3033169OAI: oai:DiVA.org:liu-15769DiVA: diva2:127230
Linda Höglund, Per-Olof Holtz, H. Pettersson, C. Asplund, Q. Wang, H. Malm, S. Almqvist, E. Petrini and J. Y. Andersson, Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors, 2008, Applied Physics Letters, (93), 203512.
Copyright: American Institute of Physics