Terahertz detection schemes based on sequential multi-photon absorption

Details Terahertz detection schemes based on sequential multi-photon absorption Terahertz detection schemes based on sequential multi-photon absorption

2006-02-28

arxiv.org/abs/cond-mat/0602673v1

Physics

Condensed Matter

Other Condensed Matter

3 pages, 2 figures; submitted to Applied Physics Letters

Scientific paper

10.1063/1.2201552

We present modeling and simulation of prototypical multi bound state quantum well infrared photodetectors and show that such a detection design may overcome the problems arising when the operation frequency is pushed down into the far infrared spectral region. In particular, after a simplified analysis on a parabolic-potential design, we propose a fully three-dimensional model based on a finite difference solution of the Boltzmann transport equation for realistic potential profiles. The performances of the proposed simulated devices are encouraging and support the idea that such design strategy may face the well-known dark-current problem.

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