Tuneable visible resonances in crescent shaped nano-split-ring resonators

Clark, A.W. and Sheridan, A.K. and Glidle, A. and Cumming, D.R.S. and Cooper, J.M. (2007) Tuneable visible resonances in crescent shaped nano-split-ring resonators. Applied Physics Letters, 91 (9). 093109.

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Abstract

Electron beam lithography was used to fabricate gold crescent shaped split-ring resonators with 30 nm minimum feature size. By varying the crescent’s arc length over a range of nanometer-scale dimensions the authors demonstrate the tuneability of visible resonances within such structures. Results, which correlate closely with those predicted using finite-difference time-domain modeling, open the way for these devices to be used in near-field biological sensing.