Open Access Nano Express

Programmable nanoengineering templates for fabrication of three-dimensional nanophotonic structures

Qingfeng Lin, Siu-Fung Leung, Kwong-Hoi Tsui, Bo Hua and Zhiyong Fan*

Author Affiliations

Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China

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Nanoscale Research Letters 2013, 8:268  doi:10.1186/1556-276X-8-268

Published: 7 June 2013

Abstract

Porous anodic alumina membranes (AAMs) have attracted great amount of attention due to their potential application as templates for nanoengineering. Template-guided fabrication and assembly of nanomaterials based on AAMs are cost-effective and scalable methods to program and engineer the shape and morphology of nanostructures and nanomaterials. In this work, perfectly ordered AAMs with the record large pitch up to 3 μm have been fabricated by properly controlling the anodization conditions and utilization of nanoimprint technique. Due to the capability of programmable structural design and fabrication, a variety of nanostructures, including nanopillar arrays, nanotower arrays, and nanocone arrays, have been successfully fabricated using nanoengineered AAM templates. Particularly, amorphous Si nanocones have been fabricated as three-dimensional nanophotonic structures with the characterization of their intriguing optical anti-reflection property. These results directly indicate the potential application of the reported approach for photonics and optoelectronics.

Keywords:
Large-pitch anodic alumina membranes; Programmable nanoengineering templates; Nanocones; Three-dimensional nanophotonic structures