We demonstrate experimentally local coupling of light from free space to exciton-surface plasmon polaritons (X-SPPs). This is achieved by using a single, sub-wavelength gold nanowire on top of a thin silver film which is covered with a 30 nm thick layer of J-aggregating dyes in polyvinyl alcohol. We show that the nanowire acts as an antenna that resonantly scatters light to X-SPPs states with a Rabi splitting of 0.1 eV. The locally excited X-SPPs properties are studied by angle resolved spectroscopy of the far-field leaky photons and are compared to the large-scale response through Kretschmann reflection measurements and to theoretical calculations. The nanowire scattering properties are studied by dark-field scattering measurements and finite-difference time-domain simulations. This method to locally excite X-SPPs can potentially be useful for future applications of hybrid light matter states.
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2 June 2014
Research Article|
June 04 2014
Local excitation of strongly coupled exciton-surface plasmons polaritons by a single nanoantenna
E. Eizner;
E. Eizner
a)
Department of Physical Electronics, Fleischman Faculty of Engineering,
Tel Aviv University
, Tel Aviv 69978, Israel
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T. Ellenbogen
T. Ellenbogen
Department of Physical Electronics, Fleischman Faculty of Engineering,
Tel Aviv University
, Tel Aviv 69978, Israel
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a)
Electronic mail: eladeiz@post.tau.ac.il
Appl. Phys. Lett. 104, 223301 (2014)
Article history
Received:
May 01 2014
Accepted:
May 23 2014
Citation
E. Eizner, T. Ellenbogen; Local excitation of strongly coupled exciton-surface plasmons polaritons by a single nanoantenna. Appl. Phys. Lett. 2 June 2014; 104 (22): 223301. https://doi.org/10.1063/1.4881717
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