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Ultra sub-wavelength surface plasmon confinement using air-gap, sub-wavelength ring resonator arrays.

ABSTRACT: Arrays of sub-wavelength, sub-10?nm air-gap plasmonic ring resonators are fabricated using nanoimprinting. In near infra-red (NIR) range, the resonator supports a single dipole mode which is excited and identified via simple normal illumination and explored through transmission measurements. By controlling both lateral and vertical confinement via a metal edge, the mode volume is successfully reduced down to 1.3?×?10(-5) ?0(3). The advantage of such mode confinement is demonstrated by applying the resonators biosensing. Using bovine serum albumin (BSA) molecules, a dramatic enhancement of surface sensitivity up to 69?nm/nm is achieved as the modal height approaches the thickness of the adsorbed molecule layers.

SUBMITTER: Lee J

PROVIDER: S-EPMC4770440 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

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Ultra sub-wavelength surface plasmon confinement using air-gap, sub-wavelength ring resonator arrays.

Lee Jaehak J Sung Sangkeun S Choi Jun-Hyuk JH Eom Seok Chan SC Mortensen N Asger NA Shin Jung H JH

Scientific reports 20160229

Arrays of sub-wavelength, sub-10 nm air-gap plasmonic ring resonators are fabricated using nanoimprinting. In near infra-red (NIR) range, the resonator supports a single dipole mode which is excited and identified via simple normal illumination and explored through transmission measurements. By controlling both lateral and vertical confinement via a metal edge, the mode volume is successfully reduced down to 1.3 × 10(-5) λ0(3). The advantage of such mode confinement is demonstrated by applying t ...[more]

PMID: 26923610

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