Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Photonik II
Q 58.5: Vortrag
Donnerstag, 22. März 2007, 15:00–15:15, 5J
Collective Photon Modes in Coupled-Resonator Optical Waveguides — •Björn M. Möller1, Mikhail V. Artemyev2, and Ulrike Woggon1 — 1Fachbereich Physik, Universität Dortmund, 44227 Dortmund — 2Institute for Physico-Chemical Problems, Belarussian State University
Waveguides composed of coherently coupled microcavities — so-called coupled-resonator optical waveguides (CROWs) [1-3] — represent promising microstructures for slowing down the group velocity of light.
In this contribution, we apply spatially and spectrally resolved Bloch-mode mapping to study collective photon modes in chains of coherently coupled polymeric microspheres. An efficient excitation of optical Bloch modes inside the coupled-resonator chains is demonstrated in the visible spectral range utilizing nanocrystals as dopants. The experimental results are explained with an analytical coupled-harmonic oscillator model. Experimentally, a slowing-factor S =31 for the group velocity of light has been determined at the Bloch band center as a lower bound.
We discuss the impact of size variations in a coupled-resonator chain.
The modification of the coupled cavity fields and the respective changes of the dispersion relation are evaluated for several types of cavity size variations.
[1] A. Yariv, et al., Opt. Lett. 24, 711 (1999)
[2] B. M. Möller, et al., Opt. Lett. 30 (16), 2116 (2005)
[3] B. M. Möller, et al., J. Opt. A 8, S113 (2006)