Abstract
The non-local optical interaction of two semiconductor microdisks with a
waveguide bridged at radial direction is proposed and studied by three dimensional
finite-difference time-domain (FDTD) electromagnetic simulations. The strong and
weak optical interactions between two microdisks are observed and ascribed to the
internal coupled modes with different coupling ratios. The vertical radiation losses
and the related mode quality factors are modulated by waveguide length and present
oscillation characteristics for the resonant modes. In addition, the optical leakage
of coupling system is affected by the etching depth of disks due to the emission of
minor components of electric field.
© 2014 Chinese Optics Letters
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