Gold-black manufacture, microstructure, and optical characterization

A previous contribution formulates a first-principle dipole antenna theory for predicting the polarization-sensitive directional spectral absorptance of gold-black in the near infrared. The current contribution chronicles a successful effort to validate that theory. After a brief review of gold-blac...

Full description

Saved in:
Bibliographic Details
Published in:Applied optics (2004) 2021-08, Vol.60 (23), p.6857
Main Authors: Munir, Nazia B., Mahan, J. R., Doan, Luan C., Vinh, N. Q., Priestley, Kory J.
Format: Article
Language:English
Subjects:
Absorptance
Absorptivity
Coatings
Dipole antennas
First principles
Gold
Microstructure
Near infrared radiation
Optical properties
Polarization
Reflectometers
Substrates
Vapor deposition
Zenith
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A previous contribution formulates a first-principle dipole antenna theory for predicting the polarization-sensitive directional spectral absorptance of gold-black in the near infrared. The current contribution chronicles a successful effort to validate that theory. After a brief review of gold-black history, we describe in some detail the design and construction of a vapor-deposition cell for laying down gold-black coatings on a mirrorlike gold substrate. The microstructure of 4- and 8-µm-thick coatings is revealed using scanning electron microscopy. An automated bench-level reflectometer has been used to measure the in-plane bidirectional reflectivity of the gold-black coatings in the visible (532 nm) and near-infrared (800 nm) for p and s polarization. Measurements are reported over incident zenith angles ranging between 10 and 50 deg. Results obtained using the apparatus are consistent with the dipole antenna theory in this range of incident zenith angles.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.430686