Abstract

Coupling between whispering-gallery modes is studied using imaging spectroscopy in pairs of size-selected (size deviation of $<0.03\%$) spheres in a touching position. In a special geometrical configuration, peculiar shapes resembling kites are observed in the spectral images of bispheres by coupling of multiple pairs of azimuthal modes. The maximal WGM coupling is observed in the equatorial plane of spheres determined by the substrate. The WGM coupling constant is quantified for spheres from 2.9 to $6\mu \text{m}$ for such modes.

© 2009 Optical Society of America

Effect of a dielectric substrate on whispering-gallery-mode sensors

Nicolas Le Thomas, Ulrike Woggon, Wolfgang Langbein, and Mikhail V. Artemyev
J. Opt. Soc. Am. B 23(11) 2361-2365 (2006)

Percolation of light through whispering gallery modes in 3D lattices of coupled microspheres

Vasily N. Astratov and Shashanka P. Ashili
Opt. Express 15(25) 17351-17361 (2007)

Whispering gallery modes in single triangular ZnO nanorods

Xinzheng Zhang, Xuejin Zhang, Jiabin Xu, Xudong Shan, Jun Xu, and Dapeng Yu
Opt. Lett. 34(16) 2533-2535 (2009)

Interrogation of whispering-gallery modes resonances in cylindrical microcavities by backreflection detection

Vanessa Zamora, Antonio Díez, Miguel V. Andrés, and Benito Gimeno
Opt. Lett. 34(7) 1039-1041 (2009)

Coupling of whispering-gallery modes in size-mismatched microdisk photonic molecules

Svetlana V. Boriskina
Opt. Lett. 32(11) 1557-1559 (2007)