Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors
Research output: Contribution to journal › Article
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 mu m 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 mu m with small changes in the applied bias. These tuning properties could be essential for applications such as modulators and dual-color infrared detection.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Applied Physics Letters|
|Publication status||Published - 2008|