An optical nanocavity incorporating a fluorescent organic dye having a high quality factor

Adawi, Ali M.; Fry, Paul W.; Lidzey, David G.; Murshidy, Mohamed M.

Abstract

We have fabricated an L3 optical nanocavity operating at visible wavelengths that is coated with a thin-film of a fluorescent molecular-dye. The cavity was directly fabricated into a pre-etched, free-standing silicon-nitride (SIN) membrane and had a quality factor of Q = 2650. This relatively high Q-factor approaches the theoretical limit that can be expected from an L3 nanocavity using silicon nitride as a dielectric material and is achieved as a result of the solvent-free cavity-fabrication protocol that we have developed. We show that the fluorescence from a red-emitting fluorescent dye coated onto the cavity surface undergoes strong emission intensity enhancement at a series of discrete wavelengths corresponding to the cavity modes. Three dimensional finite difference time domain (FDTD) calculations are used to predict the mode structure of the cavities with excellent agreement demonstrated between theory and experiment.

Citation

Adawi, A. M., Fry, P. W., Lidzey, D. G., & Murshidy, M. M. (2010). An optical nanocavity incorporating a fluorescent organic dye having a high quality factor. ACS Nano, 4(6), 3039-3044. https://doi.org/10.1021/nn1001479

• Journal Article Type: Article
• Acceptance Date: May 19, 2010
• Online Publication Date: May 25, 2010
• Publication Date: Jun 22, 2010
• Deposit Date: Nov 13, 2014
• Publicly Available Date: Nov 23, 2017
• Journal: ACS nano
• Print ISSN: 1936-0851
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 4
• Issue: 6
• Pages: 3039-3044
• DOI: https://doi.org/10.1021/nn1001479
• Keywords: General Engineering; General Physics and Astronomy; General Materials Science
• Public URL: https://hull-repository.worktribe.com/output/462735
• Publisher URL: http://pubs.acs.org/doi/abs/10.1021/nn1001479
• Additional Information: Authors' accepted manuscript of article published in: ACS nano, 2010, v.4, issue 6
• Contract Date: Nov 23, 2017