On-chip terahertz systems for spectroscopy and imaging

Cunningham, J. E.; Byrne, Matthew B.; Wood, C.; Dazhang, L.

doi:10.1049/el.2010.3317

Cited by 26 publications

(22 citation statements)

References 27 publications

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“…Examples of lately reported spectroscopic imaging applications include medical imaging of tissues [38], label-free protein detection [39], distribution of polymorphic forms in pharmaceutical tablets [40], on-chip THz spectroscopy systems [41].…”

Section: Imagingmentioning

confidence: 99%

Terahertz technologies: present and future

Nagatsuma

2011

IEICE Electron. Express

184

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A number of technical breakthroughs in electronics and photonics made since the early 1990s have started to bring terahertz (THz)-wave technologies from laboratory demonstrators to industrial applications such as non-destructive testing, security, medicine, communications, etc. This paper overviews the latest progress in THz-wave technologies in terms of components such as sources and detectors, and system applications, and discusses future challenges towards market developments. Keywords: terahertz, source, detector, spectroscopy, imaging, communication Classification: Fiber optics, Microwave photonics, Optical interconnection, Photonic signal processing, Photonic integration and systems References[1] D. Grischkowsky, S. Keiding, M. van Exter, and Ch. Fattinger, "Farinfrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors,"

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Section: Imagingmentioning

confidence: 99%

Terahertz technologies: present and future

Nagatsuma

2011

IEICE Electron. Express

184

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“…It can be clearly seen that both nanowire detector and reference InP detector show 80% transmission in amplitude due to the same filter. Therefore, single GaAs/AlGaAsnanowires are able to produce electrical responses to a THz signal, and when compared with standard THz detectors, such nanoscale devices bring many advantages for future applications whenever size or spatial resolution is critical, such as on-chip applications 16,21 . with three enhanced electric field peaks.…”

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confidence: 99%

Single Nanowire Photoconductive Terahertz Detectors

et al. 2014

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Spectroscopy and imaging in the terahertz (THz) region of the electromagnetic spectrum has proven to provide important insights in fields as diverse as chemical analysis, materials characterization, security screening, and nondestructive testing. However, compact optoelectronics suited to the most powerful terahertz technique, time-domain spectroscopy, are lacking. Here, we implement single GaAs nanowires as microscopic coherent THz sensors and for the first time incorporated them into the pulsed time-domain technique. We also demonstrate the functionality of the single nanowire THz detector as a spectrometer by using it to measure the transmission spectrum of a 290 GHz low pass filter. Thus, nanowires are shown to be well suited for THz device applications and hold particular promise as near-field THz sensors.

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“…[6][7][8][9][10][11][12][13][14] Parallel plate waveguides filled with dielectrics were shown to increase the technique's sensitivity by confining THz waves only to the sub-wavelength size region between the plates. 6 The sensitivity to small objects can be increased further by inserting a resonant cavity 7 or by adiabatic tapering of the waveguide plates.…”

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confidence: 99%

“…6 The sensitivity to small objects can be increased further by inserting a resonant cavity 7 or by adiabatic tapering of the waveguide plates. [8][9][10] THz field confinement to extremely small volumes can be achieved by a twin-needle probe, 11 by planar transmission lines, which can be used for on-chip THz spectroscopy, 12,13 and by long narrow slits.…”

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confidence: 99%

Terahertz imaging of sub-wavelength particles with Zenneck surface waves

Navarro‐Cía

Natrella

Dominec

et al. 2013

Applied Physics Letters

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Impact of sub-wavelength-size dielectric particles on Zenneck surface waves on planar metallic antennas is investigated at terahertz (THz) frequencies with THz near-field probe microscopy. Perturbations of the surface waves show the particle presence, despite its sub-wavelength size. The experimental configuration, which utilizes excitation of surface waves at metallic edges, is suitable for THz imaging of dielectric sub-wavelength size objects. As a proof of concept, the effects of a small strontium titanate rectangular particle and a titanium dioxide sphere on the surface field of a bow-tie antenna are experimentally detected and verified using full-wave simulations.

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On-chip terahertz systems for spectroscopy and imaging

Cited by 26 publications

References 27 publications

Terahertz technologies: present and future

Terahertz technologies: present and future

Single Nanowire Photoconductive Terahertz Detectors

Terahertz imaging of sub-wavelength particles with Zenneck surface waves

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