A 500-700 GHz system for exploring the THz frequency regime

Hellicar, Andrew; Li, Li; Greene, K.J.; Hislop, Greg; Hanham, Stephen M.; Nikolic, Nasiha; Du, Jia

doi:10.1109/auswireless.2007.2

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Multi-spectral Imaging Systems1

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Cited by 30 publications

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“…A lock-in amplifier synchronized with the chopper is used to acquire the voltage responses, which are processed by a computer to produce an image. More details about the THz system can be found in reference [29,30]. Figure 6 shows a photograph of the measurement bench top.…”

Section: Multi-spectral Imaging Systemsmentioning

confidence: 99%

Terahertz and Millimetre Wave Imaging with a Broadband Josephson Detector Working above 77 K

Hellicar

Hanham

et al. 2010

J Infrared Milli Terahz Waves

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A high-T c superconducting (HTS) broadband Josephson detector has been developed and applied to millimetre wave (mm-wave) and terahertz (THz) imaging. The detector is based on a YBa 2 Cu 3 O 7-x (YBCO) step-edge Josephson junction, which is coupled to a thin-film log-periodic antenna, designed for operation at 200-600 GHz, and a hemispheric silicon lens. The junction parameters have been optimised to achieve a high I c R n value so that the detector responds well to the specified frequencies at liquid nitrogen temperature (77 K). Images at ∼200 GHz and ∼600 GHz were acquired with the same detector; each demonstrated their unique properties. The results demonstrate the potential of achieving a cheaper, compact and portable multi-spectral imager based on a HTS detector.

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Section: Multi-spectral Imaging Systemsmentioning

confidence: 99%