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III-Nitride Heterostructure Layered Tunnel Barriers For a Tunable Hyperspectral Detector

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5 Author(s)
Bell, L.D. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA ; Tripathi, N. ; Grandusky, J.R. ; Jindal, V.
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We report on the fabrication and characterization of Ill-nitride layered tunnel barriers with applications for a new type of tunable hyperspectral imaging detector with intrinsically hyperspectral pixels. This would enable each pixel to be individually tunable in real-time through a range of wavelengths, with the number and width of spectral channels being dynamically adjustable. Shape-engineered electron barriers fabricated from III-nitride heterostructures allow barrier height to be varied by application of a voltage. A spectroscopy of photon wavelength is enabled via the collection of photoexcited electrons across this barrier. The device is envisioned for tunable detection of ultraviolet through infrared wavelengths.

Published in:

Sensors Journal, IEEE  (Volume:8 ,  Issue: 6 )