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Welcome to the Insciences Journal

Insciences Journal (ISSN 1664-171X), an Open Access, peer-reviewed journal publishes original research papers and reviews. The Insciences Journal is focusing on four main sections: Climate Change, Stem Cells, Nanotechnology and Sensors.

Insciences J. 2014, 4(1), 19-26;doi:10.5640/insc.040119

Full Research Paper, Section: Nanotechnology

Polarization and incident angle insensitive germanium nano-pyramid array for perfect absorption in visible regime

Qi Han1, Lei Jin1, Yongqi Fu1 * email, Weixing Yu2 * email

1 School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China
2 State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, 130033, P.R. China

* Author to whom correspondence should be addressed.

Published: March 19, 2014

Complete Article

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Abstract

An extraordinary light harvesting property of a periodic nano-pyramid array is reported. It is found that the nano-pyramid array can absorb light efficiently with an average absorptivity of 0.998 over the whole visible waveband. The ultra-high absorption is independent of the incoming light on polarization state and insensitive within a broad angle range. We attribute the efficient light harvesting property of the nano-pyramid array to Fabry-Perot resonance physically. This perfect absorber has advantages of easy fabrication, cost effective, and stable energy harvesting.

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