Spectral, spatial, and survivability evaluation of a binder-depleted, isotropic mat, nanotube spray coating

Published

May 3, 2021

Author(s)

Matthew Spidell, Davis conklin, Christopher Yung, EVANGELOS THEOCHAROUS, John H. Lehman

Abstract

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.

Citation

Applied Optics

Volume

58

Issue

2

Pub Type

Journals

Download Paper

https://doi.org/10.1364/AO.58.000257

Local Download

Keywords

Detector materials, Nanomaterials, Far infrared or terahertz, metrology, Integrating spheres

Citation

Spidell, M. , conklin, D. , Yung, C. , Theocharous, E. and , J. (2021), 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 October 8, 2025)