Large format long-wavelength infrared narrow-band, multi-band, and broad-band QWIP focal plane arrays

Gunapala, Sarath D.; Bandara, S. V.; Liu, John K.; Rafol, Sir B.; Mumolo, Jason M.

doi:10.1117/12.504900

Cited by 2 publications

(1 citation statement)

References 19 publications

(62 reference statements)

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“…[1][2][3][4][5] Detectors covering a broad spectral range while at the same time having the ability to tailor and/or tune the spectral response range are in great demand. [1][2][3][4][5] Detectors covering a broad spectral range while at the same time having the ability to tailor and/or tune the spectral response range are in great demand.…”

Section: Introductionmentioning

confidence: 99%

Self-consistent performance modeling for dualband detectors

Matsik

Perera

2008

Journal of Applied Physics

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Probing and modelling the localized self-mixing in a GaN/AlGaN field-effect terahertz detectorDualband and multiband detectors have generated interest for their ability to measure two very different wavelength bands simultaneously. The dualband detection is achieved by using two different mechanisms to cover the two separate response bands: an interband process for the shorter wavelengths, and free carrier absorption followed by internal photoemission for the longer wavelengths. Previously the two processes have been modeled separately, and a reasonable agreement has been obtained on the spectral shape, although the entire wavelength range has not been covered in a single model. Also, the previous modeling efforts did not give an absolute scale for the response, instead using an experimentally determined gained factor to fix the absolute response. Here a model is presented ͑which does not use any fitting parameters͒ which can provide absolute responsivity values and detector performance parameters. By using a Monte Carlo approach including various scattering mechanisms, the carrier transport is modeled giving an absolute value for the dark current and photocurrent. The results are used to predict the spectral response for a GaN / AlGaN UV-IR dual band heterojunction detector.

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