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Phys. Rev. Lett. 82, 4623–4626 (1999)

Tight-Binding Photonic Molecule Modes of Resonant Bispheres

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T. Mukaiyama1, K. Takeda2, H. Miyazaki3, Y. Jimba4, and M. Kuwata-Gonokami1,*
1Department of Applied Physics, the University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan, Cooperative excitation project ERATO, Japan Science and Technology Corporation (JST), Tokyo, Japan
2Tsukuba Research Laboratory, JSR. Co., 25, Miyukigaoka, Tsukuba, Ibaraki, 305-0841, Japan
3Department of Applied Physics, Tohoku University, Aramaki, Aoba08, 980-8579, Japan
4College of Engineering, Nihon University, Koriyama, Fukushima, 963, Japan

Received 9 November 1998; published in the issue dated 7 June 1999

We observe coherent resonant coupling of optical whispering-gallery modes in fluorescence from dye doped polymer bispheres with diameters ranging from 2 to 5μm. By monitoring the frequencies of fluorescence peaks of individual spheres, we sort out two spheres with appropriate size matching and bring them into contact. Wave optics calculation also gives good agreement with the experiment. By taking into account harmonic coupling of the whispering-gallery modes, the obtained features of normal mode splitting are well explained by the tight-binding photon picture.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.4623
DOI:
10.1103/PhysRevLett.82.4623
PACS:
42.60.Da

*Author to whom correspondence should be addressed. Electronic address: gonokami@ap.t.u-tokyo.ac.jp