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Distance-dependence of the coupling between split-ring resonators and single-quantum-well gain

Meinzer, N.; König, M.; Ruther, M.; Linden, S.; Khitrova, G.; Gibbs, H.M.; Busch, K.; Wegener, M.

Abstract:
We present low-temperature femtosecond pump-probe experiments on arrays of silver split-ring resonators coupled to single quantum wells, in which we vary the geometrical separation between the two components to study the variation of coupling with distance. Its strength is found to decrease exponentially with increasing separation with a 1/e length on the order of 8 nm. We further link our experimental results to numerical calculations of the near fields which show the same distance-dependence as the coupling strength in the experiment. Together, this confirms the assumption of a near-field-assisted coupling mechanism.


Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2011
Sprache Englisch
Identifikator ISSN: 0003-6951
KITopen ID: 1000027141
HGF-Programm 43.14.01; LK 01
Erschienen in Applied Physics Letters
Band 99
Heft 11
Seiten 111104/1 - 3
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