Giant angular dispersion mediated by plasmonic modal competition

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50981

Title:	Giant angular dispersion mediated by plasmonic modal competition
Authors:	Tai,CY;Yu,WH;Chang,SH
Contributors:	光電科學與工程學系
Keywords:	LIGHT
Date:	2010
Issue Date:	2012-03-27 18:14:31 (UTC+8)
Publisher:	國立中央大學
Abstract:	We report on the modal competition mediated angular dispersion by heterogeneously coupled plasmonic waveguides. By varying the wavelength of the excitation, the surface waves propagate alongside the upper and lower interfaces can be manipulated in coupled, decoupled, and cutoff regimes. Depending on the coupling states, the output beam can be steered between +15 degrees and -17 degrees for wavelength from lambda = 695nm to lambda = 675nm. The maximum achieved angular dispersion can be as large as 2.1 degrees/nm. This finding may revolutionize current design concept of spectrometers, providing a significant way to scale down the form factor further into nano-size. (C) 2010 Optical Society of America
Relation:	OPTICS EXPRESS
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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