Ultra-thin optical interference coatings on rough and flexible substrates


Mikhail A. Kats and Federico Capasso. 2014. “Ultra-thin optical interference coatings on rough and flexible substrates.” APPLIED PHYSICS LETTERS, 105, 13, Pp. 131108. Publisher's Version


Recently demonstrated ultra-thin optical coatings comprising nanometer-thick highly absorbing films on top of reflecting substrates can display strong optical interference effects, resulting in structural colors and absorption enhancement. Here, we demonstrate that these optical interference effects persist when the films are deposited on substrates that have a large degree of roughness and inhomogeneity on micro- and nano-scales. In particular, we deposited films of gold and amorphous germanium onto paper which serves as a rough and flexible substrate and observe matte interference colors that vary as a function of the germanium thickness. (C) 2014 AIP Publishing LLC.
Last updated on 05/24/2020