The evaluation of the performance of two pyroelectric detectors with vertically aligned multi-walled carbon nanotube coatings

Theocharous, S.; Theocharous, E; Lehman, John H.

doi:10.1016/j.infrared.2012.03.006

Cited by 24 publications

(14 citation statements)

References 16 publications

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“…The very low reflectance of VANTA coatings has been experimentally demonstrated in the visible [8] and infrared wavelengths [9][10][11][12][13][14]. VANTA coatings have already been used as black coatings on thermal detectors [12,13,15].…”

Section: Blackbodies In Earth Observationmentioning

confidence: 97%

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The partial space qualification of a vertically aligned carbon nanotube coating on aluminium substrates for EO applications

Theocharous¹,

Chunnilall²,

Mole³

et al. 2014

Opt. Express

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The fabrication of NanoTube Black, a Vertically Aligned carbon NanoTube Array (VANTA) on aluminium substrates is reported for the first time. The coating on aluminium was realised using a process that employs top down thermal radiation to assist growth, enabling deposition at temperatures below the substrate's melting point. The NanoTube Black coatings were shown to exhibit directional hemispherical reflectance values of typically less than 1% across wavelengths in the 2.5 µm to 15 µm range. VANTA-coated aluminium substrates were subjected to space qualification testing (mass loss, outgassing, shock, vibration and temperature cycling) before their optical properties were re-assessed. Within measurement uncertainty, no changes to hemispherical reflectance were detected, confirming that NanoTube Black coatings on aluminium are good candidates for Earth Observation (EO) applications.

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Section: Blackbodies In Earth Observationmentioning

confidence: 97%

“…VANTA coatings have already been used as black coatings on thermal detectors [12,13,15]. Carbon nanotubes have also been used to successfully coat both sides of the 600 µm wide slit of the Ocean Radiometer for Carbon Assessment (ORCA) in order to reduce stray light [16].…”

Section: Blackbodies In Earth Observationmentioning

confidence: 99%

The partial space qualification of a vertically aligned carbon nanotube coating on aluminium substrates for EO applications

Theocharous¹,

Chunnilall²,

Mole³

et al. 2014

Opt. Express

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show abstract

“…The same facility was also used to map the spatial distribution of the phase delay introduced by the presence of the VANTA coating. The phase delay provided information on the spatial uniformity of the thermal diffusivity of the VANTA coating [17].…”

Section: B Methods Of Evaluating the Performance Of The Test Detectormentioning

confidence: 99%

“…The linearity of response of the VANTA-coated detector was measured on the NPL linearity of response measurement facility [16], which uses the flux superposition method. This measurement also provides information on the thermal diffusivity and thermal conductivity of the VANTA coating [17]. Finally, the response of the test detector to incident radiant power modulated at a range of frequencies was measured and was compared with the corresponding measurement of an uncoated LiTaO 3 pyroelectric detector of identical thickness.…”

Section: B Methods Of Evaluating the Performance Of The Test Detectormentioning

confidence: 99%

“…The test detector offers superior SNR characteristics compared to previous VANTA-coated pyroelectric detectors [17], so the spectral responsivity measurements were extended to 24 μm. Figure 2 shows the relative spectral responsivity of the VANTA/Sicoated pyroelectric detector in the 0.8-24 μm wavelength range, normalized at a wavelength of 1 μm.…”

Section: A Spectral Responsivitymentioning

confidence: 99%

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Assembly and evaluation of a pyroelectric detector bonded to vertically aligned multiwalled carbon nanotubes over thin silicon

Theocharous

Lehman

2013

Appl. Opt.

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A novel pyroelectric detector consisting of a vertically aligned nanotube array on thin silicon (VANTA/Si) bonded to a 60 μm thick crystal of LiTaO₃ has been fabricated. The performance of the VANTA/Si-coated pyroelectric detector was evaluated using National Physical Laboratory's (NPL's) detector-characterization facilities. The relative spectral responsivity of the detector was found to be spectrally flat in the 0.8-24 μm wavelength range, in agreement with directional-hemispherical reflectance measurements of witness samples of the VANTA. The spatial uniformity of response of the test detector exhibited good uniformity, although the nonuniformity increased with increasing modulation frequency. The nonuniformity may be assigned either to the dimensions of the VANTA or the continuity of the bond between the VANTA/Si coating and the pyroelectric crystal substrate. The test detector exhibited a small superlinear response, which is similar to that of pyroelectric detectors coated with good quality gold-black coatings.

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Evolutionary Photonics for Renewable Energy, Nanomedicine, and Advanced Material Engineering

Favraud

Gongora

Fratalocchi

2018

Laser & Photonics Reviews

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Taking inspiration from complex natural phenomena such as chaos and unpredictability, as well as highly optimized organisms constituted by multitudes of interacting cells, evolutionary photonics aims at developing new sustainable technologies for renewable energy production, bioimaging, and scalable materials with advanced optical functionalities. These photonics systems integrate complex dielectric and/or metallic units into large networks of heterogeneous elements, which are entirely controlled by acting on the interactions among the different units that compose the network. This Review presents a selection of recent results in this research field, discussing advantages, challenges and perspectives of this technology in addressing global challenges in several scientific areas, ranging from broadband light energy harvesting, to scalable clean water production, early‐stage cancer detection, sensing, artificial intelligence, invisible structures, and to large‐scale optical materials with programmable functionality and robust structural coloration.

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The evaluation of the performance of two pyroelectric detectors with vertically aligned multi-walled carbon nanotube coatings

Cited by 24 publications

References 16 publications

The partial space qualification of a vertically aligned carbon nanotube coating on aluminium substrates for EO applications

The partial space qualification of a vertically aligned carbon nanotube coating on aluminium substrates for EO applications

Assembly and evaluation of a pyroelectric detector bonded to vertically aligned multiwalled carbon nanotubes over thin silicon

Evolutionary Photonics for Renewable Energy, Nanomedicine, and Advanced Material Engineering

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