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Lao, Y-F; Perera, AGU; Li, LH; Khanna, SP; Linfield, EH; Zhang, YH; Wang, TM (2016)
Publisher: Optical Society of America
Languages: English
Types: Article
Subjects:

Classified by OpenAIRE into

arxiv: Physics::Optics
We report a wavelength threshold extension, from the designed value of 3.1 to 8.9 μm, in a -type heterostructure photodetector. This is associated with the use of a graded barrier and barrier offset, and arises from hole–hole interactions in the detector absorber. Experiments show that using long-pass filters to tune the energies of incident photons gives rise to changes in the intensity of the response. This demonstrates an alternative approach to achieving tuning of the photodetector response without the need to adjust the characteristic energy that is determined by the band structure.
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    • 1. H. Schneider and H. C. Liu, Quantum Well Infrared Photodetectors: Physics and Applications, vol. 126 of Springer series in optical sciences (Springer, New York, 2007).
    • 2. A. G. U. Perera, Advances in Infrared Photodetectors (Semiconductors and Semimetal Series)), vol. 84 (Elsevier, 2011).
    • 3. Y.-F. Lao, A. G. U. Perera, L. H. Li, S. P. Khanna, E. H. Linfield, and H. C. hot-carrier photodetection beyond the bandgap spectral 8, 412 (2014).
    • 4. P. V. V. Jayaweera, S. G. Matsik, A. G. U. Perera, H. C. Liu, M. Buchanan, and Z. R. 3-5 93, 5.
    • Technology 41, 213 238 (2000).
    • H. Schneider, C. Schönbein, M. Walther, K. Schwarz, J. Fleissner, and P. Koidl, well infrared photodetectors: The fourzone 71, 246 248 (1997). cascade 10. Y.-F. Lao, A. G. Unil Pe of GaAs/AlGaAs interfaces probed by internal Lett. 105, 171603 (2014).
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