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.