Enhanced Terahertz Receiver Using a Distributed Bragg Reflector Coupled to a Photoconductive Antenna

Author

Faulks, Richard ; Evans, Mike ; Page, Hideaki ; Malik, Surama ; Gregory, Ian ; Farrer, Ian ; Ritchie, David ; Pepper, Michael

Author_Institution

Cavendish Lab., Univ. of Cambridge, Cambridge, UK

Volume

21

Issue

21

fYear

2009

Firstpage

1603

Lastpage

1605

Abstract

We report the use of a terahertz (THz) receiver fabricated using a photoconductive antenna mounted upon a distributed Bragg reflector (DBR). It is shown that the relative performance of the device is in accordance with the reflectivity curves of the DBR. At maximum reflectivity the device improved upon the reference THz signal by up to 30%. In addition, we characterize the saturation of the device with laser pump power and it is shown that the device exhibits an improved optical efficiency when compared to the reference receiver.

Keywords

antennas; distributed Bragg reflectors; microwave photonics; photoconducting switches; reflectivity; terahertz wave detectors; DBR; device saturation; distributed Bragg reflector; laser pump power; optical efficiency; photoconductive antenna; reflectivity curves; terahertz receiver fabrication; Distributed Bragg reflector (DBR); gallium arsenide; photoconductivity; terahertz (THz);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2030690

Filename

5223543