Experimental verification of the rainbow trapping effect in adiabatic plasmonic gratings

Qiaoqiang Gan; Yongkang Gao; Kyle Wagner; Dmitri Vezenov; Yujie J. Ding; Filbert J. Bartoli

doi:10.1073/pnas.1014963108

Experimental verification of the rainbow trapping effect in adiabatic plasmonic gratings

Qiaoqiang Gan, Yongkang Gao, Kyle Wagner, Dmitri Vezenov, Yujie J. Ding, Filbert J. Bartoli

Research output: Contribution to journal › Article › peer-review

143 Scopus citations

Abstract

We report the experimental observation of a trapped rainbow in adiabatically graded metallic gratings, designed to validate theoretical predictions for this unique plasmonic structure. One-dimensional graded nanogratings were fabricated and their surface dispersion properties tailored by varying the grating groove depth, whose dimensions were confirmed by atomic force microscopy. Tunable plasmonic bandgaps were observed experimentally, and direct optical measurements on graded grating tructures show that light of different wavelengths in the 500-700-nm region is "trapped" at different positions along the grating, consistent with computer simulations, thus verifying the "rainbow" trapping effect.

Original language	English (US)
Pages (from-to)	5169-5173
Number of pages	5
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	108
Issue number	13
DOIs	https://doi.org/10.1073/pnas.1014963108
State	Published - Mar 29 2011
Externally published	Yes

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title = "Experimental verification of the rainbow trapping effect in adiabatic plasmonic gratings",

abstract = "We report the experimental observation of a trapped rainbow in adiabatically graded metallic gratings, designed to validate theoretical predictions for this unique plasmonic structure. One-dimensional graded nanogratings were fabricated and their surface dispersion properties tailored by varying the grating groove depth, whose dimensions were confirmed by atomic force microscopy. Tunable plasmonic bandgaps were observed experimentally, and direct optical measurements on graded grating tructures show that light of different wavelengths in the 500-700-nm region is {"}trapped{"} at different positions along the grating, consistent with computer simulations, thus verifying the {"}rainbow{"} trapping effect.",

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AU - Gan, Qiaoqiang

AU - Gao, Yongkang

AU - Wagner, Kyle

AU - Vezenov, Dmitri

AU - Ding, Yujie J.

AU - Bartoli, Filbert J.

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N2 - We report the experimental observation of a trapped rainbow in adiabatically graded metallic gratings, designed to validate theoretical predictions for this unique plasmonic structure. One-dimensional graded nanogratings were fabricated and their surface dispersion properties tailored by varying the grating groove depth, whose dimensions were confirmed by atomic force microscopy. Tunable plasmonic bandgaps were observed experimentally, and direct optical measurements on graded grating tructures show that light of different wavelengths in the 500-700-nm region is "trapped" at different positions along the grating, consistent with computer simulations, thus verifying the "rainbow" trapping effect.

AB - We report the experimental observation of a trapped rainbow in adiabatically graded metallic gratings, designed to validate theoretical predictions for this unique plasmonic structure. One-dimensional graded nanogratings were fabricated and their surface dispersion properties tailored by varying the grating groove depth, whose dimensions were confirmed by atomic force microscopy. Tunable plasmonic bandgaps were observed experimentally, and direct optical measurements on graded grating tructures show that light of different wavelengths in the 500-700-nm region is "trapped" at different positions along the grating, consistent with computer simulations, thus verifying the "rainbow" trapping effect.

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JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

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Experimental verification of the rainbow trapping effect in adiabatic plasmonic gratings

Abstract

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