Metamaterial-Based Terahertz Imaging

Carranza, Ivonne Escorcia; Grant, James P.; Gough, John; Cumming, David R. S.

doi:10.1109/tthz.2015.2463673

Cited by 52 publications

(31 citation statements)

References 32 publications

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“…For nanophotonic elements integration to IS, there have been several methods, such as physical attachment, [ 72 ] post-CMOS process, [73][74][75] back-end-of-line CMOS process. [76][77][78]88,89,94,95 ] Results of both photocurrent measurement and real imaging process prove the functions. Although the former two are achievable in laboratory research, the later one is a practical way.…”

Section: Discussionmentioning

confidence: 90%

“…A minimum NEP of 37 pW Hz –1/2 and a thermal time constant of 68 ms was achieved. In 2015, they extended this single pixel sensor to a 5 × 5 pixel array with a pixel size of 30 μm × 30 μm . As shown in Figure a, the metamaterial was made directly in the metallic and insulating layers available in the six metal layer CMOS foundry process.…”

Section: Other Nanophotonic Issmentioning

confidence: 99%

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Nanophotonic Image Sensors

Chen

Wen

et al. 2016

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The increasing miniaturization and resolution of image sensors bring challenges to conventional optical elements such as spectral filters and polarizers, the properties of which are determined mainly by the materials used, including dye polymers. Recent developments in spectral filtering and optical manipulating techniques based on nanophotonics have opened up the possibility of an alternative method to control light spectrally and spatially. By integrating these technologies into image sensors, it will become possible to achieve high compactness, improved process compatibility, robust stability and tunable functionality. In this Review, recent representative achievements on nanophotonic image sensors are presented and analyzed including image sensors with nanophotonic color filters and polarizers, metamaterial‐based THz image sensors, filter‐free nanowire image sensors and nanostructured‐based multispectral image sensors. This novel combination of cutting edge photonics research and well‐developed commercial products may not only lead to an important application of nanophotonics but also offer great potential for next generation image sensors beyond Moore's Law expectations.

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Section: Discussionmentioning

confidence: 90%

Section: Other Nanophotonic Issmentioning

confidence: 99%

Nanophotonic Image Sensors

Chen

Wen

et al. 2016

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“…R&S structures have been the subject of intensive invest igation for aerospace/ defence related applications (Baskey et al 2017). This rapid progress in the field of R&S technology has explored high performance composite structures like curved, multilayered, frequency selective surface (FSS) impacted and sandwiched R&S structures (Varadan et al 2010, Carranza et al 2015, Yang et al 2016b, Baskey et al 2017, Szabo 2017. However, it is quite difficult to measure the performance of such heterogeneous structures due to their design complexities.…”

Section: Introductionmentioning

confidence: 99%

Performance and non-destructive evaluation methods of airborne radome and stealth structures

Panwar

Lee

2018

Meas. Sci. Technol.

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In the past few years, great effort has been devoted to the fabrication of highly efficient, broadband radome and stealth (R&S) structures for distinct control, guidance, surveillance and communication applications for airborne platforms. The evaluation of non-planar aircraft R&S structures in terms of their electromagnetic performance and structural damage is still a very challenging task. In this article, distinct measurement techniques are discussed for the electromagnetic performance and non-destructive evaluation (NDE) of R&S structures. This paper deals with an overview of the transmission line method and free space measurement based microwave measurement techniques for the electromagnetic performance evaluation of R&S structures. In addition, various conventional as well as advanced methods, such as millimetre and terahertz wave based imaging techniques with great potential for NDE of load bearing R&S structures, are also discussed in detail. A glimpse of in situ NDE techniques with corresponding experimental setup for R&S structures is also presented. The basic concepts, measurement ranges and their instrumentation, measurement method of different R&S structures and some miscellaneous topics are discussed in detail. Some of the challenges and issues pertaining to the measurement of curved R&S structures are also presented. This study also lists various mathematical models and analytical techniques for the electromagnetic performance evaluation and NDE of R&S structures. The research directions described in this study may be of interest to the scientific community in the aerospace sectors.

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“…The periodic nature of MM absorbers lends itself to coupling with micro-bolometer sensing elements to form a focal plane array (FPA). MM based FPAs have been developed in both the S band (2-4 GHz) [27] and at THz frequencies (2.5 THz) where the MM absorbers were monolithically integrated into a standard 0.35 μm CMOS process and the vanadium oxide microbolometer sensors deposited on top [30,31].…”

Section: Introductionmentioning

confidence: 99%

Multi-spectral materials: hybridisation of optical plasmonic filters, a mid infrared metamaterial absorber and a terahertz metamaterial absorber

2016

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Multi-spectral imaging systems typically require the cumbersome integration of disparate filtering materials and detectors in order to operate simultaneously in multiple spectral regions. Each distinct waveband must be detected at different spatial locations on a single chip or by separate chips optimised for each band. Here, we report on a single component that optically multiplexes visible, Mid Infrared (4.5 μm) and Terahertz (126 μm) radiation thereby maximising the spectral information density. We hybridise plasmonic and metamaterial structures to form a device capable of simultaneously filtering 15 visible wavelengths and absorbing Mid Infrared and Terahertz. Our synthetic multi-spectral component could be integrated with silicon complementary metal-oxide semiconductor technology where Si photodiodes are available to detect the visible radiation and micro-bolometers available to detect the Infrared/Terahertz and render an inexpensive, mass-producible camera capable of forming coaxial visible, Infrared and Terahertz images.

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Metamaterial-Based Terahertz Imaging

Cited by 52 publications

References 32 publications

Nanophotonic Image Sensors

Nanophotonic Image Sensors

Performance and non-destructive evaluation methods of airborne radome and stealth structures

Multi-spectral materials: hybridisation of optical plasmonic filters, a mid infrared metamaterial absorber and a terahertz metamaterial absorber

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