Optical properties of the crescent-shaped nanohole antenna

Liz Y. Wu; Benjamin M. Ross; Luke P. Lee

doi:10.1021/nl9001553

Optical properties of the crescent-shaped nanohole antenna

Liz Y. Wu, Benjamin M. Ross, Luke P. Lee

Department of Chemistry & Nanoscience

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

127 Scopus citations

Abstract

We present the first optical study of large-area random arrays of crescent-shaped nanoholes. The crescent-shaped nanohole antennae, fabricated using wafer-scale nanosphere lithography, provide a complement to crescent-shaped nanostructures, called nanocrescents, which have been established as powerful plasmonic biosensors. With both systematic experimental and computational analysis, we characterize the optical properties of crescent-shaped nanohole antennae and demonstrate tunability of their optical response by varying all key geometric parameters. Crescent-shaped nanoholes have reproducible sub-10-nm tips and are sharper than corresponding nanocrescents, resulting in higher local field enhancement, which is predicted to be IEI/IE ₀I = 1500. In addition, the crescent-shaped nanohole hole-based geometry offers increased integratability and the potential to nanoconfine analyte in "hot-spot" regions, increasing biomolecular sensitivity and allowing localized nanoscale optical control of biological functions.

Original language	English
Pages (from-to)	1956-1961
Number of pages	6
Journal	Nano Letters
Volume	9
Issue number	5
DOIs	https://doi.org/10.1021/nl9001553
State	Published - 13 May 2009

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title = "Optical properties of the crescent-shaped nanohole antenna",

abstract = "We present the first optical study of large-area random arrays of crescent-shaped nanoholes. The crescent-shaped nanohole antennae, fabricated using wafer-scale nanosphere lithography, provide a complement to crescent-shaped nanostructures, called nanocrescents, which have been established as powerful plasmonic biosensors. With both systematic experimental and computational analysis, we characterize the optical properties of crescent-shaped nanohole antennae and demonstrate tunability of their optical response by varying all key geometric parameters. Crescent-shaped nanoholes have reproducible sub-10-nm tips and are sharper than corresponding nanocrescents, resulting in higher local field enhancement, which is predicted to be IEI/IE 0I = 1500. In addition, the crescent-shaped nanohole hole-based geometry offers increased integratability and the potential to nanoconfine analyte in {"}hot-spot{"} regions, increasing biomolecular sensitivity and allowing localized nanoscale optical control of biological functions.",

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AU - Wu, Liz Y.

AU - Ross, Benjamin M.

AU - Lee, Luke P.

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N2 - We present the first optical study of large-area random arrays of crescent-shaped nanoholes. The crescent-shaped nanohole antennae, fabricated using wafer-scale nanosphere lithography, provide a complement to crescent-shaped nanostructures, called nanocrescents, which have been established as powerful plasmonic biosensors. With both systematic experimental and computational analysis, we characterize the optical properties of crescent-shaped nanohole antennae and demonstrate tunability of their optical response by varying all key geometric parameters. Crescent-shaped nanoholes have reproducible sub-10-nm tips and are sharper than corresponding nanocrescents, resulting in higher local field enhancement, which is predicted to be IEI/IE 0I = 1500. In addition, the crescent-shaped nanohole hole-based geometry offers increased integratability and the potential to nanoconfine analyte in "hot-spot" regions, increasing biomolecular sensitivity and allowing localized nanoscale optical control of biological functions.

AB - We present the first optical study of large-area random arrays of crescent-shaped nanoholes. The crescent-shaped nanohole antennae, fabricated using wafer-scale nanosphere lithography, provide a complement to crescent-shaped nanostructures, called nanocrescents, which have been established as powerful plasmonic biosensors. With both systematic experimental and computational analysis, we characterize the optical properties of crescent-shaped nanohole antennae and demonstrate tunability of their optical response by varying all key geometric parameters. Crescent-shaped nanoholes have reproducible sub-10-nm tips and are sharper than corresponding nanocrescents, resulting in higher local field enhancement, which is predicted to be IEI/IE 0I = 1500. In addition, the crescent-shaped nanohole hole-based geometry offers increased integratability and the potential to nanoconfine analyte in "hot-spot" regions, increasing biomolecular sensitivity and allowing localized nanoscale optical control of biological functions.

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Optical properties of the crescent-shaped nanohole antenna

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