| Evaluating the performance of quantum point contacts as nanoscale terahertz sensors. | |
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MedLine Citation:
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PMID: 20389473 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Quantum point contacts (QPCs) are nanoscale constrictions that are realized in a high-mobility two-dimensional electron gas by applying negative bias to split Schottky gates on top of a semiconductor. Here, we explore the suitability of these nanodevices to THz detection, by making use of their ability to rectify THz signals via the strong nonlinearities that exist in their conductance. In addition to demonstrating the configuration of these devices that provides optimal THz sensitivity, we also determine their noise equivalent power and responsivity. Our studies suggest that, with further optimization, QPCs can provide a viable approach to broadband THz sensing in the range above 1 THz. |
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Authors:
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Jungwoo Song; Gregory Aizin; Yukio Kawano; Koji Ishibashi; Nobuyuki Aoki; Yuichi Ochiai; John L Reno; Jonathan P Bird |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Optics express Volume: 18 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-04-14 Completed Date: 2010-07-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: 4609-14 Citation Subset: - |
Affiliation:
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Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260-1920, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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