Open AccessSeparation-sensitive measurements of morphology dependent resonances in coupled fluorescent microspheres
Author(s) -
David B. Thompson,
David Keating,
E. Güler,
Kunihiro Ichimura,
Mary Elizabeth Williams,
Kirk A. Fuller
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.019209
Subject(s) - microsphere , bead , whispering gallery wave , materials science , fluorescence , optics , resonance (particle physics) , coupling (piping) , evanescent wave , whispering gallery , resonance fluorescence , molecular physics , emission spectrum , spectral line , laser , optoelectronics , atomic physics , physics , astronomy , chemical engineering , engineering , metallurgy , composite material
The inelastic emission spectrum of a single fluorescent microsphere (bead) exhibits resonances arising from whispering gallery modes. Two beads in close proximity form a coupled bisphere. Coherent coupling arises from each bead's evanescent field and leads to resonance splitting. Here we collect emission spectra of two coupled beads, with nearly identical diameters, as spacing between beads is varied. Using these size-matched beads allows us to probe resonance splitting under strong coupling conditions.