Analysis of system trade-offs for terahertz imaging

Mickan, Samuel P.; Abbott, Derek; Münch, J.; Zhang, X.-C.; Doorn, T van

doi:10.1016/s0026-2692(00)00023-9

Cited by 84 publications

(47 citation statements)

References 60 publications

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“…Thermal sources have weak emission at long wavelengths and gas vapor lasers are cumbersome [9]. Bolometric detectors only operate under vacuum at liquid-helium temperatures [10]. Fourier transform infrared (FTIR) spectroscopy does offer spectroscopic information down to about 1 THz, but not into the GHz regime [11].…”

Section: Thz-tdsmentioning

confidence: 99%

Double modulated differential THz-TDS for thin film dielectric characterization

Mickan

Lee

et al. 2002

Microelectronics Journal

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Terahertz differential time-domain spectroscopy (DTDS) is a new technique that uses pulsed terahertz radiation to characterize the optical properties of thin dielectric films. Characterizing thin films in the GHz to THz range is critical for the development of new technologies in integrated circuitry, photonic systems and micro-electro-mechanical systems. There are potential applications for gene and protein chips. This paper shows how DTDS can be combined with double modulation in the pump-probe system to improve sensitivity by an order of magnitude. An iterative algorithm is presented to estimate the optical properties of a given thin film. The technique is experimentally verified using 1-mm-thick samples of silicon dioxide on silicon. q

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Section: Thz-tdsmentioning

confidence: 99%

Double modulated differential THz-TDS for thin film dielectric characterization

Mickan

Lee

et al. 2002

Microelectronics Journal

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“…T-ray radiation interacts in a unique way with matter, relating to rotational and vibration modes in gas, inter-domain movement in large biomolecules, and resonances in crystals. Trays have been used to identify water levels in living tissue, measure the real-time 'dressing' of electrons in semiconductors 1,2,3 , detect malignant skin cancer 4,5 , and detect Anthrax-like spores in envelopes 6 . A newly accessible region of the electromagnetic spectrum will provide new technologies, especially if the low-power limitations of T-ray systems can be overcome.…”

Section: Introductionmentioning

confidence: 99%

Terahertz calculations for the Australian synchrotron

et al. 2004

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The development of terahertz radiation (T-rays) is spurring new applications in spectroscopy and imaging. To maximize the use of T-rays in more applications, a high average terahertz power is needed. Rather than using fast diodes or laser sources, this paper will show that a synchrotron can generate high average power T-rays. This is achieved by creating an electron bunch in the synchrotron ring with high intensity in the terahertz frequency region via Thomson scattering.

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“…Terahertz imaging has been demonstrated for imaging flames [4], leaf moisture content [5], skin burn severity [4], tooth cavities [6] and skin cancer [7]. Several excellent reviews of THz-TDS [8] and T-ray imaging [9,10] are available.…”

Section: Introductionmentioning

confidence: 99%

Identification of biological tissue using chirped probe THz imaging

Ferguson

Wang

Gray

et al. 2002

Microelectronics Journal

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We consider the application of pulsed THz imaging systems in biomedical diagnostics and mail/packaging inspection. The sub-millimetre spectroscopic measurements obtained from T-ray systems contain a wealth of information about the sample under test. We demonstrate that different types of tissue can be classified based on their terahertz response measured with the chirped probe pulse technique. We demonstrate the performance of a quadratic classifier using linear filter models for feature extraction in the discrimination between different tissues.Modern THz systems are hindered by the slow acquisition speed. The chirped probe pulse technique offers a significant improvement in this context. We present the terahertz responses of biological samples measured using a chirped probe pulse, and discuss the problem of data processing and extracting sample characteristics. q

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Analysis of system trade-offs for terahertz imaging

Abstract: In this paper we analyse the trade-offs for a terahertz imaging system and discuss implementation of a terahertz micro antenna array for imaging. We also describe applications of terahertz imaging and improvements in the signal processing. ᭧

Cited by 84 publications

References 60 publications

Double modulated differential THz-TDS for thin film dielectric characterization

Double modulated differential THz-TDS for thin film dielectric characterization

Terahertz calculations for the Australian synchrotron

Identification of biological tissue using chirped probe THz imaging

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