Title: Evanescent Wave-Assisted Symmetry Breaking of Gold Dipolar Nanoantennas
Authors: Yang, Jhen-Hong
Chen, Kuo-Ping
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
Issue Date: 1-Sep-2016
Abstract: Symmetry-breaking and scattering cancellation were observed in the dark-mode resonance of dipolar gold nanoantennas (NAs) on glass substrates coupled with oblique incidence and total internal reflection. With the assistance of evanescent waves, the coupling efficiency was twice as strong when the incidence angle was larger than the critical angle. The Hamiltonian equation and absorption spectra were used to analyze the hybridization model of symmetric dipolar gold NAs. The antibonding mode could be coupled successfully by both transverse-magnetic (TM) and transverse-electric (TE) polarizations to NAs when the dimers orientation is parallel to the propagation direction of evanescent waves.
URI: http://dx.doi.org/10.1038/srep32194
ISSN: 2045-2322
DOI: 10.1038/srep32194
Volume: 6
Appears in Collections:Articles