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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
  • 2
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    2
    • Citation Indexes
      2
  • Captures
    11

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.

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