Bloch modes and group velocity delay in coupled resonator chains

✍ Scribed by Möller, Björn M. ;Artemyev, Mikhail V. ;Woggon, Ulrike

• Book ID: 105364644
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 874 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200776410

✦ Synopsis

Abstract

Coherently coupled optical microresonators are studied as a concept for guiding and slowing down light. So‐called coupled‐resonator optical waveguides (CROWs) composed of nanocrystal doped microspheres are studied using mode mapping spectroscopy at the diffraction limit and microphotoluminescence spectroscopy. We demonstate coherent photon coupling in one‐dimensional multiresonator chains and show the evolution of individual cavity modes into waveguide modes. A coupled‐oscillator model is developed, which explains the resulting coupled‐resonator mode patterns in finite systems. The potential to slow down the group velocity of light by orders of magnitude is explored. Experimentally, a slowing‐factor S = 31 has been observed. A model for disorder in CROW structures is developed, by which size tuning of individual resonators is found to result in anticrossing relations. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)