Enhanced reflection from inverse tapered nanocone arrays

Xiang Tian Kong, Haider Butt, Ali K. Yetisen, Chuan Kangwanwatana, Yunuen Montelongo, Sunan Deng, Fernando Da Cruz Vasconcellos, Malik M. Qasim, Timothy D. Wilkinson, Qing Dai

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


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.

Original languageBritish English
Article number053108
JournalApplied Physics Letters
Issue number5
StatePublished - 4 Aug 2014


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