Multiwall carbon nanotube absorber on a thin-film lithium niobate pyroelectric detector

Abstract

Multiwall carbon nanotubes (MWNTs) were applied in a bulk layer to a pyroelectric film to increase the detector sensitivity nearly fourfold without a substantial penalty to the low-frequency response (4-100 Hz). In addition, the spectral sensitivity over the wavelength range from 600 to 1800 nm was uniformly enhanced, with variations less than 1%. The results demonstrate the suitability of MWNTs as an efficient thermal absorber having low thermal mass.

The evaluation of a pyroelectric detector with a sprayed carbon multi-wall nanotube black coating in the infrared

“…This is well within the uncertainty of the previous study [8] hence the results of the two studies are in agreement. Fig.…”

“…A previous evaluation [8] showed that the spectral responsivity of this detector was flat in the 600 nm-1.8 lm wavelength range.…”

“…The spectral responsivity of this detector was shown to be flat over the 600 nm-1800 nm wavelength range [8]. However, the main applications of thermal detectors are in the infrared, where the advantages of alternative (photon) detector technologies are not so overwhelming [5].…”

“…A 10 lm thick pyroelectric detector which was coated with a ''sprayed'' MWCNT black coating was recently fabricated and its spectral responsivity was evaluated in the 600 nm-1800 nm wavelength range [8]. The spectral responsivity of this detector was shown to be flat over the 600 nm-1800 nm wavelength range [8].…”

Multiwall carbon nanotube films surface‐doped with electroceramics for sensor applications

“…Carbon nanotubes were successfully applied in the past onto pyroelectric LiNbO 3 crystals and films [4] to improve the performance of infrared detectors. However, such devices require large pieces of thermoelectric coatings to work and they lack the flexibility of buckypaper.…”