Electromagnetic study of the quality factor of pillar microcavities in the small diameter limit

Lalanne, Ph.; Hugonin, J. P.; Gerard, J. M.
June 2004
Applied Physics Letters;6/7/2004, Vol. 84 Issue 23, p4726
Academic Journal
A thorough electromagnetic study of pillar microcavities reveals a surprising behavior for their Q factors in the strong confinement limit. Q displays a fast oscillatory variation as a function of the pillar diameter, and reaches values well in excess of the quality factor of the reference planar cavity. This behavior is explained by the hybrid character of the cavity mode in the small diameter limit, which results mainly from the electromagnetic coupling of the HE11 (i.e., fundamental) and EH11 guided modes of the cavity spacer through the associated Bloch modes in the Bragg mirrors. © 2004 American Institute of Physics.


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