A bright single photon source: Strong coupling of a single molecule to a plasmonic nano-antenna cavity
Single photon emitters are quantum light sources that can enable a variety of quantum based technologies such as quantum information or quantum random number generation, among others. These single photon emitters can have their brightness increased by coupling to a plasmonic cavity. In this work, th...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/168885 |
| Acceso en línea: | https://hdl.handle.net/2117/168885 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanophotonics Antennas (Electronics) Single molecule single photon source plasmonic cavity coupling Nanofotònica Antenes (Electrònica) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica |
| Sumario: | Single photon emitters are quantum light sources that can enable a variety of quantum based technologies such as quantum information or quantum random number generation, among others. These single photon emitters can have their brightness increased by coupling to a plasmonic cavity. In this work, this possibility is addressed by spin coating anthracene crystals hosting dibenzoterrylene (DBT) molecules on top of Au dipolar nanoantenna arrays. Thin anthracene crystals covering a big fraction of the nanoantenna arrays were achieved, on which confocal fluorescence microscopy and time correlated single photon counting have been used to characterize the emitters. A time gating based analysis has been used to separate the nanoantenna luminescence from the fluorescence of the DBT molecules, obtaining lifetime values from coupled and uncoupled molecules. A set of 149 coupled molecules and 158 uncoupled molecules was represented in a histogram, showing a distribution from whose mean values the lifetime of DBT molecules (t=4.37 ns) was acquired, as well as a mean lifetime reduction of 2.4 times and a maximum lifetime reduction of 7 times. |
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