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Large-area microstructured photomixer as scannable detector of continuous-wave terahertz radiation |
JOSA B, Vol. 29, Issue 12, pp. 3254-3258 (2012)
http://dx.doi.org/10.1364/JOSAB.29.003254
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Abstract
Detection of continuous-wave (CW) terahertz (THz) radiation is demonstrated using a large-area microstructured photomixer. The photomixer, which has interdigitated electrodes, is utilized in an incoherent detection scheme without any focusing optics for the incoming THz radiation. The large-area microstructured photomixer is driven at a high laser power of 900 mW, which results in an increased responsivity of 120 mA/W, in comparison with conventional small-area photomixer detectors. By mapping out the receiving pattern of the photomixer detector, we show that the large-area photomixer is capable of scanning the incident THz beam by changing the incidence angles of the CW laser beams used in the photomixing detection process. We demonstrate a scan range of
© 2012 Optical Society of America
OCIS Codes
(160.5140) Materials : Photoconductive materials
(190.7070) Nonlinear optics : Two-wave mixing
ToC Category:
Materials
History
Original Manuscript: June 27, 2012
Revised Manuscript: September 10, 2012
Manuscript Accepted: October 10, 2012
Published: November 8, 2012
Citation
Armaghan Eshaghi, Mahmoud Shahabadi, Lukas Chrostowski, and Saeid Kamal, "Large-area microstructured photomixer as scannable detector of continuous-wave terahertz radiation," J. Opt. Soc. Am. B 29, 3254-3258 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-12-3254
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