Femtosecond Light Transmission and Subradiant Damping in Plasmonic Crystals

C. Ropers, D. J. Park, G. Stibenz, G. Steinmeyer, J. Kim, D. S. Kim, and C. Lienau

Phys. Rev. Lett. 94, 113901 – Published 21 March 2005

Abstract

We report the first observation of subradiance in plasmonic nanocrystals. Amplitude- and phase-resolved ultrafast transmission experiments directly reveal the coherent coupling between surface plasmon polaritons (SPPs) induced by periodic variations in the dielectric function. This interaction results in the formation of plasmonic band gaps and coupled SPP eigenmodes with different symmetries, as directly shown by near-field imaging. In antisymmetric modes, radiative SPP damping is strongly suppressed, increasing the SPP lifetime from 30 fs to more than 200 fs. The findings are analyzed within a coupled resonance model.

Received 20 October 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.113901

Authors & Affiliations

C. Ropers¹, D. J. Park², G. Stibenz¹, G. Steinmeyer¹, J. Kim³, D. S. Kim^2,*, and C. Lienau^1,†

¹Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, D-12489 Berlin, Germany
²School of Physics, Seoul National University, Seoul 151-742, Korea
³Korea Research Institute of Standards and Science, Yusung, Taejon 305-600, Korea

^*Electronic address: denny@snu.ac.kr
^†Electronic address: lienau@mbi-berlin.de

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Vol. 94, Iss. 11 — 25 March 2005

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