Quantitative Analysis Of Oscillatory Variations In The Quality Factor Of Micropillar Cavities

Gregersen, Niels; Nielsen, Torben Roland; Mørk, Jesper
October 2009
AIP Conference Proceedings;10/7/2009, Vol. 1176 Issue 1, p115
Academic Journal
The influence of the pillar radius on the Q factor of a micropillar cavity is investigated numerically. The relation between Q factor and pillar radius shows an advanced oscillatory behavior which cannot be explained in a ID model. We propose a multi-mode Fabry-Perot model to quantify the oscillation period observed and we show that the governing mechanism behind the oscillation is coupling to higher-order propagating Bloch modes in the distributed Bragg reflectors. We demonstrate that even though the Q factor is an advanced function involving many oscillating contributions, the model still allows for the determination of a characteristic oscillation period.


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