The study of multiwall carbon nanotubes light reflectivity

In this paper we study the light reflectivity of multiwall carbon nanotubes (MWCNTs) in the wavelength of range 1150nm–1755 nm, it reveals from our measurements that when the multiwall carbon nanotubes are pattern-grown its return loss is linear inversely proportional to the nanotubes grown height and with this characteristics the pattern-grown CNTs can be utilized as a good optical attenuator. However for nanotubes when it is fabricated in high density but pattern-less it has greater than 45 dB return loss, this is equivalent to have less than 0.56% reflectivity; it has high absorption effect and consequently can be utilized as a black body absorber.