OpEx
Post date: Sep 10, 2013 10:19:13 PM
Optical near-field–mediated polarization asymmetry induced by two-layer nanostructures
Makoto Naruse1, Naoya Tate2, Yasuyuki Ohyagi3, Morihisa Hoga3, Tsutomu Matsumoto4, Hirokazu Hori5, Aurelien Drezet6, Serge Huant6, and Motoichi Ohtsu2
1National Institute of Information and Communications Technology, Tokyo, Japan
2The University of Tokyo, Tokyo, Japan
3Dai Nippon Printing Co. Ltd., Chiba, Japan
4Yokohama National University, Kanagawa, Japan
5University of Yamanashi, Yamanashi, Japan
6Institut Neel, CNRS and University of Joseph Fourier, France
Opt. Express 21, 21857-21870 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-19-21857
Abstract
We demonstrate that a two-layer shape-engineered nanostructure exhibits asymmetric polarization conversion efficiency thanks to near-field interactions. We present a rigorous theoretical foundation based on an angular-spectrum representation of optical near-fields that takes account of the geometrical features of the proposed device architecture and gives results that agree well with electromagnetic numerical simulations. The principle used here exploits the unique intrinsic optical near-field processes associated with nanostructured matter, while eliminating the need for conventional scanning optical fiber probing tips, paving the way to novel nanophotonic devices and systems.