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

Theocharous, E; Theocharous, S P*; Lehman, J H* (2013) Assembly and evaluation of a pyroelectric detector bonded to vertically aligned multiwalled carbon nanotubes over thin silicon. Appl. Opt., 52 (33). pp. 8054-8059.

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Abstract

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 NPL's detector characterisation facilities. The relative spectral responsivity of the detector was found to be spectrally flat in the 0.8 µm to 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 non-uniformity increased with increasing modulation frequency. The non-uniformity 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 super-linear response, which is similar to that of pyroelectric detectors coated with good quality goldblack coatings.

Item Type: Article
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Radiometry and Detectors
Identification number/DOI: 10.1364/AO.52.008054
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/6021

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