Development of a Terahertz Imaging System

Hellicar, Andrew; Du, Jia; Nikolic, Nasiha; Li, L.; Greene, K.J.; Beeton, Nicholas J.; Hanham, Stephen M.; Kot, J.S.; Hislop, Greg

doi:10.1109/aps.2007.4396802

Cited by 11 publications

(7 citation statements)

References 7 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%

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

Hellicar

Hanham

et al. 2010

J Infrared Milli Terahz Waves

Self Cite

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“…Precision lens alignment and maintenance of these aligned lenses are important for maximizing the beam signal or signal-to-noise ratio thus obtaining the best quality images. Off-axis parabolic mirrors were used in our earlier imaging system [ 12 , 13 , 14 , 15 , 16 ]. They proved difficult and time consuming to align and realign after any movement or relocation or change of system configuration for different measurements.…”

Section: Experimental Setup—hardware and System Configurationsmentioning

confidence: 99%

“…These electronic THz imaging systems, typically in sub-THz frequency ranges, are promising for variety practical applications (for example [ 11 ]). Optic scheme is commonly used to direct and couple the THz signal to the specimen and the detector [ 11 , 12 , 13 ]. Since the solid-state electronic devices are fabricated by planar micro-lithographic processing techniques, they can be easily scaled up to large array devices for multi-pixel imaging.…”

Section: Introductionmentioning

confidence: 99%

“…CSIRO has in recent years developed electronic component-based THz imaging systems [ 12 , 13 ], antenna-coupled integrated THz detectors [ 14 ] and sensitive superconducting detectors [ 15 , 16 , 17 ]. The previous imaging system, though producing excellent images, employed a large size backward-wave oscillator (BWO) THz source and a series of more expensive and harder to align optical mirrors to form a quasi-optical active imaging system.…”

Section: Introductionmentioning

confidence: 99%

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A Practical and Portable Solids-State Electronic Terahertz Imaging System

Smart

et al. 2016

Sensors

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A practical compact solid-state terahertz imaging system is presented. Various beam guiding architectures were explored and hardware performance assessed to improve its compactness, robustness, multi-functionality and simplicity of operation. The system performance in terms of image resolution, signal-to-noise ratio, the electronic signal modulation versus optical chopper, is evaluated and discussed. The system can be conveniently switched between transmission and reflection mode according to the application. A range of imaging application scenarios was explored and images of high visual quality were obtained in both transmission and reflection mode.

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“…To explore applications and allow technology development in the THz regime a system has been designed and implemented at the CSIRO ICT Centre's Radiophysics Laboratory site [14,15]. The system was designed to allow for rapid implementation, flexibility and experimentation [16,17,18]; with the initial components commercially sourced such that our own components can be substituted into the system at a later stage.…”

Section: Overview Of Thz Systemmentioning

confidence: 99%

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

Hellicar

Greene

et al. 2007

The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)

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The CSIRO ICT Centre has recently completed a terahertz demonstrator with the aim of exploring applications in the 500-700 GHz range. The system is capable of transmission measurements through samples, and simple modulation experiments. Further work towards realizing detection by arrays of superconducting detectors is being pursued. This paper describes the design choices and implementation of the terahertz system, discusses recent results and future directions.

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Development of a Terahertz Imaging System

Cited by 11 publications

References 7 publications

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

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

A Practical and Portable Solids-State Electronic Terahertz Imaging System

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

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