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) λ0(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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lee J,Sung S,Choi JH,Eom SC,Mortensen NA,Shin JHdoi
10.1038/srep22305subject
Has Abstractpub_date
2016-02-29 00:00:00pages
22305issn
2045-2322pii
srep22305journal_volume
6pub_type
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