Submonolayer quantum dot infrared photodetector

Ting, David Z.-Y.; Bandara, Sumith V.; Gunapala, Sarath D.; Mumolo, Jason M.; Keo, Sam A.; Hill, Cory J.; Liu, John K.; Blazejewski, Edward R.; Rafol, Sir B.; Yia-Chung Chang
March 2009
Applied Physics Letters;3/16/2009, Vol. 94 Issue 11, p111107
Academic Journal
We describe the concept of the submonolayer quantum dot infrared photodetector (SML QDIP) and report experimental device results on long-wavelength infrared detection. An SML QDIP structure was fabricated into megapixel focal plane arrays, which produced clear infrared images up to 80 K. Detectors in the focal plane showed a responsivity peak at 7.8 μm and noise equivalent temperature difference of 33 mK at 70 K.


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