Light transmission through perforated metal thin films made by island lithography
نویسندگان
چکیده
Transmission spectra of thin metal films perforated by a high density of disordered sub-wavelength diameter cylindrical holes have been measured. The films, consisting of duplex layers of chromium and gold or chromium and silver, were characterised by perforations of mean diameter, hdi and fractional area coverage, F: films with hdi and F of 187F 50 nm and 0.21, and 340F 67 nm and 0.28 were studied. The transmission efficiency of the holes in these films was near unity in the range 340–850 nm. These results are comparable to those found for ordered perforated metal films but without the spectral structure. The sheet resistance of the films, perforated and un-perforated, was measured. The sheet resistance of the un-perforated films was larger than bulk and typical for that found for un-annealed films. The additional resistance of the perforated films is consistent with available spreading resistance calculations. These results suggest that it will be possible to prepare perforated film having comparatively high optical transmission and low electrical resistance. D 2004 Elsevier B.V. All rights reserved.
منابع مشابه
The Anomalous Infrared Transmission of Gold Films on Two-Dimensional Colloidal Crystals
Tailoring optical response using periodic nanostructures is one of the key issues in the current research on functional composite materials. The anomalous light transmission through metallic films that have a regular array of submicrometer holes has stimulated much interest. This interest stems from both the underlying physics and also the perceived potential for applications in nanophotonics, ...
متن کاملPolymer blend lithography for metal films: large-area patterning with over 1 billion holes/inch2
Polymer blend lithography (PBL) is a spin-coating-based technique that makes use of the purely lateral phase separation between two immiscible polymers to fabricate large area nanoscale patterns. In our earlier work (Huang et al. 2012), PBL was demonstrated for the fabrication of patterned self-assembled monolayers. Here, we report a new method based on the technique of polymer blend lithograph...
متن کاملU-Shaped Nano-Apertures for Enhanced Optical Transmission and Resolution
The subject of light transmission through optically thin metal films perforated with arrays of subwavelength nanoholes has recently attracted significant attention. In this work, we present experimental and calculated results on optical transmission/reflection of the U-shaped nanoapertures for enhanced optical transmission and resolution. We propose different structure designs in order to prove...
متن کاملDual effect of surface plasmons in the light transmission through perforated metal films
The light transmission through perforated metal film has been studied both experimentally and theoretically. By taking account of plasma response of real metal on hole walls as well as metal surface, an analytical result for the transmission has been deduced, which agrees well with the experiments. The transmission involves both the diffraction modes and the surface plasmons. The surface plasmo...
متن کاملMultiscale patterning of plasmonic metamaterials.
The interaction of light with surface plasmons--collective oscillations of free electrons--in metallic nanostructures has resulted in demonstrations of enhanced optical transmission, collimation of light through a subwavelength aperture, negative permeability and refraction at visible wavelengths, and second-harmonic generation from magnetic metamaterials. The structures that display these plas...
متن کامل