Enhancement of refractive index sensing for an infrared plasmonic metamaterial absorber with a nanogap | Zendy

JooYun Jung | Zendy; Jihye Lee | Zendy; JunHyuk Choi | Zendy; DaeGeun Choi | Zendy; JunHo Jeong | Zendy

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Enhancement of refractive index sensing for an infrared plasmonic metamaterial absorber with a nanogap

Author(s) -

JooYun Jung,

Jihye Lee,

JunHyuk Choi,

DaeGeun Choi,

JunHo Jeong

Publication year - 2021

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.432392

Subject(s) - materials science , metamaterial , refractive index , figure of merit , plasmon , nanoimprint lithography , optics , optoelectronics , metamaterial absorber , high refractive index polymer , absorption (acoustics) , fabrication , tunable metamaterials , medicine , alternative medicine , physics , pathology , composite material

An infrared plasmonic metamaterial absorber with a nanogap was numerically and experimentally investigated as a refractive index sensor. We experimentally demonstrated large enhancements of both sensitivity (approximately 1091 nm/refractive index unit) and figure of merit (FOM*; approximately 273) owing to the nanogap formation in the metamaterial absorber to achieve perfect absorption (99%). The refractive index sensing platform was fabricated by producible nanoimprint lithography and isotropic dry etching processes to have a large area and low cost while providing a practical solution for high-performance plasmonic biosensors.

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