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Coupling strength control in photonic crystal/photonic wire multiple cavity devices

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4 Author(s)
Zain, A.R.M. ; Dept. of EE, Univ. of Glasgow, Glasgow ; Johnson, N.P. ; Sorel, M. ; De la Rue, R.M.

Resonance splitting has been demonstrated for two coupled micro-cavities with control of the free spectral range between the resonance peaks, together with a normalised transmission level of approximately 60%. Coupled micro-cavity-based structures that were separated by two closely spaced in-line coupler sections between the two micro-cavities have also been successfully fabricated and measured. The coupling strength of the two cavities was controlled via the use of hole tapering in the middle section between the two cavities. 2D finite-difference time-domain simulation shows close agreement with the results of measurements.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 5 )