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High-Pass Optical Filters Based on Gold-Coated Nanochannel Glass Materials

Published online by Cambridge University Press:  10 February 2011

A. Rosenberg  and
R. J. Tonucci
A. Rosenberg
Affiliation:
Naval Research Laboratory, Washington, DC 20375
R. J. Tonucci
Affiliation:
Naval Research Laboratory, Washington, DC 20375
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Abstract

We have fabricated high-pass optical filters from thin nanochannel glass (NCG) wafers coated with sputtered and evaporated gold films. The near-infrared (IR) transmission spectra of these filters have a sharp cutoff at a wavelength that scales linearly with the channel diameter, as expected for hollow metallic waveguides. Cutoff wavelengths approaching 1 μm have been achieved to date using NCG materials with sub-micron channel diameters. The spectra are dominated by a strongly resonant transmission peak just above the cutoff wavelength, where the peak transmission can be as much as twice that predicted based on the geometrical open area of the NCG structure. The NCG wafers were typically less than 20 μm thick, and the Au films ranged in thickness up to 600 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 431: Symposium P – Microporous and Macroporous Materials , 1996 , 367
Copyright
Copyright © Materials Research Society 1996

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