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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.


Paul W. Fry

David G. Lidzey

Mohamed M. Murshidy


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.

Journal Article Type Article
Publication Date Jun 22, 2010
Journal ACS nano
Print ISSN 1936-0851
Electronic ISSN 1936-086X
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 4
Issue 6
Pages 3039-3044
Institution 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). doi:10.1021/nn1001479. ISSN 1936-0851
Keywords General Engineering; General Physics and Astronomy; General Materials Science
Publisher URL
Copyright Statement ©2016 University of Hull
Additional Information Authors' accepted manuscript of article published in: ACS nano, 2010, v.4, issue 6


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