Palaferri, D, Todorov, Y, Gacemi, D et al. (5 more authors) (2018) Noise characterization of patch antenna THz photodetectors. Applied Physics Letters, 113 (16). e161105. ISSN 0003-6951
Abstract
Current noise fluctuations have been investigated in terahertz (THz) quantum well photodetectors embedded in antenna-coupled photonic architectures and compared with standard substrate-coupled mesa detectors. The noise measurements give a value of the photoconductive gain that is in excellent agreement with that extracted from previous responsivity calibrations. Moreover, our results confirm that the noise equivalent power (NEP) of the antenna-coupled devices is of the order of 0.2 pW/Hz0.5. This low NEP value and the wide band frequency response (∼GHz) of the detectors are ideal figures for the development of heterodyne receivers that are, at present, a valuable technological solution to overcome the current limitation of THz sensors.
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Copyright, Publisher and Additional Information: | This article is protected by copyright. Published by AIP. This is an author produced version of a paper published in AIP Applied Physics Letters. Uploaded in accordance with the publisher's self-archiving policy. | ||||||
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Institution: | The University of Leeds | ||||||
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) | ||||||
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Depositing User: | Symplectic Publications | ||||||
Date Deposited: | 19 Oct 2018 12:00 | ||||||
Last Modified: | 20 Oct 2018 02:55 | ||||||
Status: | Published | ||||||
Publisher: | American Institute of Physics | ||||||
Identification Number: | https://doi.org/10.1063/1.5051580 |