1.
Engineering surface lattice resonance of elliptical gold nanodisk array for enhanced strain sensing.
Opt Express
; 26(25): 33215-33225, 2018 Dec 10.
Artigo
em Inglês
| MEDLINE
| ID: mdl-30645477
RESUMO
We demonstrate an elliptical gold nanodisk array (GNA) for engineering the spectral profile of surface lattice resonance (SLR). The nanodisk's shape has a great impact on SLR. Small linewidth of 20 nm at an aspect ratio of 1.17, as well as large wavelength tuning of 64 nm within 4% strain via different orientations and polarizations, are achieved experimentally. The enhanced wavelength response of 6.93 nm per 1% strain variation for elliptical GNA is 2.4 times better than that for general circular GNA. Furthermore, the strain sensing for elliptical GNA approaches is 5.7 times greater than that for circular GNA.