Photonics Research, 2018, 6 (9): 09000887, Published Online: Sep. 5, 2018
Dark dimer mode excitation and strong coupling with a nanorod dipole 
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Fig. 1. Au nanorod dimer excitation with an electric dipole. (a) Mode profile and surface charge distribution of a longitudinal dipole mode in a single Au nanorod and hybridized bright and dark modes in a nanorod dimer; (b) resonant wavelengths of bright and dark modes as a function of dimer spacing d d
Fig. 2. (a) Schematic of plasmonic strong coupling in an Au nanorod structure. A single nanorod is placed along the middle line of the nanorod dimer with a separation of h k
Fig. 3. (a) Scattering spectral splitting of the coupled nanorods with different coupling distance. The dashed curve shows the scattering of an individual dipolar nanorod. Electric field profiles of the coupled nanorods with a coupling distance h = 10 nm h
Fig. 4. Scattering spectra of the coupled nanorods with varying dipole resonator length L b L b
Fig. 5. Coherent energy exchange between the dipole mode and the dark dimer mode. (a) Complete energy exchange within the strong coupling regime, (b) partial energy exchange with a detuned frequency between the dipole and the dark dimer modes, (c) energy exchange with a lower exchange rate in the weakly coupled dipole and dark dimer modes. Time-dependent electric field amplitudes near the dipolar nanorod and the dark dimer are measured at the corresponding colored spots denoted in the inset of (a), which are 1 nm away from the rod end. The parameters of coupled nanorods are the same as in Fig. 3 , except L b h
Yixiao Gao, Ning Zhou, Zhangxing Shi, Xin Guo, Limin Tong. Dark dimer mode excitation and strong coupling with a nanorod dipole[J]. Photonics Research, 2018, 6(9): 09000887.
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