Modelling defect cavities formed in inverse three-dimensional rod-connected diamond photonic crystals

Taverne, Mike P. C., Ho, Daniel, Zheng, Xu, Liu, S., Chen, Lifeng, Lopez-Garcia, Martin and Rarity, John G. (2017) Modelling defect cavities formed in inverse three-dimensional rod-connected diamond photonic crystals. Europhysics Letters, 116 (6). ISSN 0295-5075

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Abstract

Defect cavities in 3D photonic crystal can trap and store light in the smallest volumes allowable in dielectric materials, enhancing non-linearities and cavity QED effects. Here, we study inverse rod-connected diamond (RCD) crystals containing point defect cavities using plane-wave expansion and finite-difference time domain methods. By optimizing the dimensions of the crystal, wide photonic bandgaps are obtained. Mid-bandgap resonances can then be engineered by introducing point defects in the crystal. We investigate a variety of single spherical defects at different locations in the unit cell focusing on high-refractive-index-contrast (3.3:1) inverse RCD structures; quality factors (Q-factors) and mode volumes of the resonant cavity modes are calculated. By choosing a symmetric arrangement, consisting of a single sphere defect located at the center of a tetrahedral arrangement, mode volumes < 0.06 cubic wavelengths are obtained, a record for high-index cavities.

Item Type:	Article
Uncontrolled Keywords:	Photonic bandgap materials, Microcavity and microdisk lasers, Cavity quantum electrodynamics
Subjects:	H600 Electronic and Electrical Engineering J500 Materials Technology not otherwise specified
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Paul Burns
Date Deposited:	12 Sep 2019 13:31
Last Modified:	10 Oct 2019 15:17
URI:	http://nrl.northumbria.ac.uk/id/eprint/40663

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