Open AccessAll-metal nanostructured substrates as subtractive color reflectors with near-perfect absorptance
Author(s) -
Ray Jia Hong Ng,
Xiao Ming Goh,
Joel K. W. Yang
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.032597
Subject(s) - absorptance , subtractive color , materials science , optics , surface plasmon , nanostructure , absorption (acoustics) , saturation (graph theory) , visible spectrum , metal , plasmon , surface plasmon polariton , optoelectronics , reflectivity , physics , nanotechnology , mathematics , combinatorics , metallurgy
All-metal structures consisting of nanoprotrusions on a bulk silver layer are theoretically investigated and shown to have narrow near-perfect absorption peaks (>95%). Within the constraints of constant nanostructure height (50 nm) and pitch (250 nm), these peaks are tunable across the visible spectrum by adjusting the width and shape of the protrusion. The peaks are caused by localized surface plasmon resonances leading to dissipation on the surface of the protrusions. As the peaks occur in the visible range, they produce subtractive colors with high saturation, in accordance with Schrödinger's rule for maximum pigment purity.