title: Evanescent Wave-Assisted Symmetry Breaking of Gold Dipolar Nanoantennas.
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.
authors: Institute of Photonic System, National Chiao Tung University, 301 Gaofa 3rd Road, Tainan 71150, Taiwan.
authors: Jhen-Hong
authors: JH
authors: Yang
authors: Institute of Imaging and Biomedical Photonics, National Chiao Tung University, 301 Gaofa 3rd Road, Tainan 71150, Taiwan.
authors: Kuo-Ping
authors: KP
authors: Chen