Spectral, spatial, and survivability evaluation of a binder-depleted, isotropic mat, nanotube spray coating
Matthew Spidell, Davis conklin, Christopher Yung, EVANGELOS THEOCHAROUS, John H. Lehman
We have improved the manufacturability of spectrally flat pyroelectric detectors for visible to mid-infrared wavelengths by demonstrating a spray-on, binder-depleted, carbon nanotube coating compatible with LiTaO3 sensors. This commercially available process, when compared against previous compatible coatings, shows the highest responsivity yet attained with under 1 % spectral non-uniformity from 300 nm to 12 μm and spectral responsivity uncertainty (k=2) under 0.4 %. The spatial non-uniformity of the assembled sensor is under 0.5 % over the central half (4 mm) of the absorber. As with previous developments employing multi-walled carbon nanotube non-directional (sprayed) coatings, the absorber surface is sufficiently robust to withstand cleaning by compressed air-blast and survived repeated vacuum cycling without notable effects on responsivity.
, conklin, D.
, Yung, C.
, Theocharous, E.
and , J.
Spectral, spatial, and survivability evaluation of a binder-depleted, isotropic mat, nanotube spray coating, Applied Optics, [online], https://doi.org/10.1364/AO.58.000257, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926125
(Accessed December 5, 2021)