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A design for an optical-nanocavity optimized for use with surface-bound light-emitting materials

Adawi, A. M.; Lidzey, D. G.

Authors

D. G. Lidzey



Abstract

We model the modification in the spontaneous emission (SE) rate of an emitting dipole placed on the surface of a two-dimensional (2D) L3 optical nanocavity using 3D FDTD calculations. We show that by introducing a concave region into the cavity-surface, the cavity Q-factor is largely unaffected, however the electromagnetic field intensity at the dielectric-air interface is significantly enhanced compared to a regular L3 (planar) structure. Our calculations indicate that such a modification of the cavity surface leads to peak emission intensity enhancements (at the cavity-mode resonance) for a dipole emitter of 0.1 nm linewidth by a factor of 33 times. For an emitter having a linewidth of 12 nm, a peak intensity enhancement of 43 times is predicted. Finally, we show that enhancements of up to 42 times in SE rate can be expected for surface-bound (organic) emitters, with our structures having possible applications as nanosensor devices and single-photon light-sources.

Journal Article Type Article
Publication Date Jun 30, 2008
Journal NEW JOURNAL OF PHYSICS
Print ISSN 1367-2630
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 10
Issue 6
Pages 065011
APA6 Citation Adawi, A. M., & Lidzey, D. G. (2008). A design for an optical-nanocavity optimized for use with surface-bound light-emitting materials. New Journal of Physics, 10(6), 065011. doi:10.1088/1367-2630/10/6/065011
DOI https://doi.org/10.1088/1367-2630/10/6/065011
Keywords General Physics and Astronomy