Enhanced reflection from inverse tapered nanocone arrays

We computationally and experimentally demonstrate enhanced reflection effects displayed by silicon-based inverted nanocone arrays. A 3D finite element model is used to characterize the optical properties of the nanocone arrays with respect to the change in polarization and incident angles. The nanoc...

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Bibliographic Details
Published in:Applied physics letters 2014-08, Vol.105 (5)
Main Authors: Kong, Xiang-Tian, Butt, Haider, Yetisen, Ali K., Kangwanwatana, Chuan, Montelongo, Yunuen, Deng, Sunan, Cruz Vasconcellos, Fernando da, Qasim, Malik M., Wilkinson, Timothy D., Dai, Qing
Format: Article
Language:English
Subjects:
Angles (geometry)
Applied physics
Arrays
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DIFFRACTION
ELECTRON BEAMS
ENERGY CONSERVATION
FINITE ELEMENT METHOD
INFRARED SPECTRA
LATTICE PARAMETERS
NANOSTRUCTURES
Near infrared radiation
OPTICAL PROPERTIES
REFLECTION
SILICON
Three dimensional models
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Summary:We computationally and experimentally demonstrate enhanced reflection effects displayed by silicon-based inverted nanocone arrays. A 3D finite element model is used to characterize the optical properties of the nanocone arrays with respect to the change in polarization and incident angles. The nanocone arrays are fabricated by e-beam lithography in hexagonal and triangular geometries with a lattice constant of 300 nm. The fabricated devices show a two-fold increase in reflection compared with bare silicon surface, as well as a strong diffraction within the visible and near-infrared spectra. The nanocone arrays may find a variety of applications from optical devices to energy conservation technologies.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4892580