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Molecules for Single Photons

Event Details

Event Dates: 

Friday, July 28, 2017 - 2:00am

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Kyle Major

Speaker Affiliation(s): 

Imperial College London
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Public Seminar

Event Details & Abstract: 

Single organic molecules are attractive candidates for solid-state quantum emitters. They show strong, stable and narrow emission at cryogenic temperatures acting as a good approximation to a two-level system. An isolated dibenzoterrylene (DBT) molecule doped into an anthracene matrix is influenced by the surrounding environment of the crystal. The crystal causes an inhomogeneous broadening allowing us to isolate a single molecule in a sparsely doped crystal using a confocal microscope. However, it also dephases the two-level system and changes the transverse decay rate as a function of temperature. We have probed the excited state population of a single molecule over time by measuring the second order correlation function of the emitted light (g^(2)(t)) across various dephasing rates and saturation intensities. I will also present our progress in coupling these single molecules to optical fibre microcavities and, photonic and plasmonic waveguides. Hopefully, enabling the use of these molecules as useful single photon sources.

[1] Kyle D. Major et al. Rev. Sci. Instrum. 59, 083106 (2015)

[2] C. Polisseni et al, Opt. Ex. 24, 5 (2016)

[3] S. Grandi et al. Phys. Rev. A 94 063839 (2016)