Conference proceedings article
Nanoscale concave structures for field enhancement in organic thin films
Publication Details
Authors: | Goszczak, A.; Adam, J.; Cielecki, P.; Fiutowski, J.; Rubahn, H.; Madsen, M.; Madsen, M. |
Editor: | Boardman, Allan D.; Tsai, Din Ping |
Publisher: | SPIE |
Place: | Bellingham, Wash.,USA |
Publication year: | 2015 |
Journal: | Proceedings of SPIE |
Pages range : | 95473I |
Book title: | Plasmonics: Metallic Nanostructures and Their Optical Properties XIII |
Title of series: | SPIE Proceedings |
Number in series: | 9547 |
ISBN: | 9781628417135 |
ISSN: | 0277-786X |
DOI-Link der Erstveröffentlichung: |
URN / URL: |
Abstract
A promising method for improving light-absorption in thin-film devices is demonstrated via electrode structuring using Anodic Alumina Oxide (AAO) templates. We present nano-scale concave Al structures of controlled dimensions, formed after anodic oxidation of evaporated high purity aluminum (Al) films and alumina etching. We investigate both experimentally and theoretically the field-enhancement supported by these concave nanostructures as a function of their dimensions. For the experimental investigations, a thin layer of organic polymer coating allows the application of a nondestructive laser ablation technique that reveals field-enhancement at the ridges of the Al nanostructures. The experimental results are complemented by finite-difference time-domain (FDTD) simulations, to support and explain the outcome of the laser ablation experiments. Our method is easily up-scalable and lithography-free and allows one to generate nanostructured electrodes that potentially support field-enhancement in organic thin-film devices, e.g., for the use in future energy harvesting applications.
A promising method for improving light-absorption in thin-film devices is demonstrated via electrode structuring using Anodic Alumina Oxide (AAO) templates. We present nano-scale concave Al structures of controlled dimensions, formed after anodic oxidation of evaporated high purity aluminum (Al) films and alumina etching. We investigate both experimentally and theoretically the field-enhancement supported by these concave nanostructures as a function of their dimensions. For the experimental investigations, a thin layer of organic polymer coating allows the application of a nondestructive laser ablation technique that reveals field-enhancement at the ridges of the Al nanostructures. The experimental results are complemented by finite-difference time-domain (FDTD) simulations, to support and explain the outcome of the laser ablation experiments. Our method is easily up-scalable and lithography-free and allows one to generate nanostructured electrodes that potentially support field-enhancement in organic thin-film devices, e.g., for the use in future energy harvesting applications.
