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

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

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.

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. https://doi.org/10.1088/1367-2630/10/6/065011

• Journal Article Type: Article
• Acceptance Date: Feb 9, 2008
• Online Publication Date: Jun 30, 2008
• 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
• DOI: https://doi.org/10.1088/1367-2630/10/6/065011
• Keywords: General Physics and Astronomy
• Public URL: https://hull-repository.worktribe.com/output/400132