標題: Manipulation of the Steering and Shaping of SPPs via Spatially Inhomogeneous Polarized Illumination
作者: Lan, Tzu-Hsiang
Tien, Chung-Hao
光電工程學系
顯示科技研究所
Department of Photonics
Institute of Display
公開日期: 25-Oct-2010
摘要: In this paper, we demonstrated a far-field scheme for the manipulation of locally excited surface plasmon polaritons (SPPs). This scheme features steering and shaping capabilities, and relies on the focusing of a high numerical aperture, in conjunction with spatially inhomogeneous polarized (SIP) illumination. We were able to control the propagation and direction of SPPs, via the field distribution of polarization at the entrance pupil, without the need for an aperture, protrusion or any other near-field features. Depending on the axial position of the focus, the field distribution of excited SPPs revealed either counter-propagating interference or a multi-casting plasmonic source. The results of near-field imaging demonstrated the versatility of the SPPs, showing strong agreement with the predictions made during simulations. Due to the simplicity and versatility of the proposed method, we believe that it could have a significant impact the processes employed in the excitation of a variety of SPPs. (C) 2010 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.18.023314
http://hdl.handle.net/11536/32052
ISSN: 1094-4087
DOI: 10.1364/OE.18.023314
期刊: OPTICS EXPRESS
Volume: 18
Issue: 22
起始頁: 23314
結束頁: 23323
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