Large-Area microstructured photomixer as scannable detector of continuous-wave terahertz radiation
Journal of the Optical Society of America B: Optical Physics, ISSN: 0740-3224, Vol: 29, Issue: 12, Page: 3254-3258
2012
- 2Citations
- 11Captures
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Article Description
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 50°. Moreover, the optimum spot size of the laser beams illuminating the photomixer detector for maximizing the responsivity of the detector is specified. © 2012 Optical Society of America.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84870676589&origin=inward; http://dx.doi.org/10.1364/josab.29.003254; https://opg.optica.org/abstract.cfm?URI=josab-29-12-3254; https://www.osapublishing.org/abstract.cfm?URI=josab-29-12-3254; https://www.osapublishing.org/viewmedia.cfm?URI=josab-29-12-3254&seq=0; https://dx.doi.org/10.1364/josab.29.003254; https://opg.optica.org/josab/abstract.cfm?uri=josab-29-12-3254
Optica Publishing Group
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