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A Bowtie Antenna Coupled Tunable Photon-Assisted Tunneling Double Quantum Well (DQW) THz Detector

Published online by Cambridge University Press:  21 March 2011

Majid M. Khodier ,
Christos G. Christodoulou  and
Jerry A. Simmons
Majid M. Khodier
Affiliation:
The University of New Mexico Dept. of Electrical & Computer Engineering Albuquerque, NM 87131, U.S.A.
Christos G. Christodoulou
Affiliation:
The University of New Mexico Dept. of Electrical & Computer Engineering Albuquerque, NM 87131, U.S.A.
Jerry A. Simmons
Affiliation:
Sandia National Laboratories Albuquerque, NM 87185-1415, U.S.A.
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Abstract

The integration of a bowtie antenna with a double electron layer tunneling transistor (DELTT) device for the purposes of THz detection is investigated in this paper. The concept of THz detection, based on photon-assisted tunneling (PAT) between the two electron layers in a double quantum well (DQW) heterostructure, will be explained. The detector is expected to have narrowband, electrically tunable, fast response, and the possibility to operate at relatively high temperatures. Since the active area of the detector is very small, which is necessary to achieve fast response, it is not efficient in collecting THz radiation. Therefore, a broadband bowtie antenna is integrated with the detector to efficiently collect the THz radiation. Characteristics of different bowtie antenna geometries at THz frequencies were studied. An equivalent circuit model of the THz detector was developed, for the first time, to estimate the impedance characteristics at THz frequencies. Such a model is crucial for achieving impedance matching between the DELTT and the antenna to increase the overall coupling efficiency.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 692: Symposium H – Progress in Semiconductor Materials for Optoelectronic Applications , 2001 , H4.2.1
Copyright
Copyright © Materials Research Society 2002

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