Multilevel architectures based on semiconductor nanostructures appear as promising designs for unipolar mid-infrared detectors. In this paper we theoretically investigate their feasibility in the terahertz frequency range. Here, the performances of common quantum-well photo-detectors, based on a single bound subband, are severely hindered by high dark current and low Tblib values. We will demonstrate that, in this respect, the multi-subband scheme represents a better alternative to the conventional design.

Feasibility of sequential multiphoton absorption for terahertz radiation detection / Castellano, Fabrizio; Iotti, Rita Claudia; Rossi, Fausto. - In: PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE. - ISSN 1862-6300. - STAMPA. - 5:1(2008), pp. 273-276. [10.1002/pssc.200776520]

Feasibility of sequential multiphoton absorption for terahertz radiation detection

CASTELLANO, FABRIZIO;IOTTI, Rita Claudia;ROSSI, FAUSTO
2008

Abstract

Multilevel architectures based on semiconductor nanostructures appear as promising designs for unipolar mid-infrared detectors. In this paper we theoretically investigate their feasibility in the terahertz frequency range. Here, the performances of common quantum-well photo-detectors, based on a single bound subband, are severely hindered by high dark current and low Tblib values. We will demonstrate that, in this respect, the multi-subband scheme represents a better alternative to the conventional design.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1668606
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