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Nonlinear core-shell yagi-uda nanoantenna for highly tunable directive emission

R.S. Savelev ; O.N. Sergaeva ; Denis Baranov (Institutionen för fysik (Chalmers)) ; A.E. Krasnok ; A. Al'u
Optics InfoBase Conference Papers Vol. Part F43-CLEO_AT 2017 (2017),
[Konferensbidrag, refereegranskat]

We propose a novel type of tunable Yagi-Uda nanoantenna composed of metal-dielectric (Ag- Ge) core-shell nanoparticles. By choosing the appropriate nanoantenna parameters we excite a Van Hove singularity, supporting high values of directivity and Purcell factor within the same narrow frequency range. Our analysis reveals the possibility of flexible dynamical tuning of the hybrid nanoantenna emission pattern via electron-hole plasma excitation by additional fs-laser signal pulses.



Denna post skapades 2017-06-30.
CPL Pubid: 250305

 

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