Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Nano-Optics I
Q 25.5: Vortrag
Dienstag, 1. März 2016, 15:30–15:45, f342
Single molecules coupled to nano-photonic structures — •Oliver Neitzke1, Guenther Kewes1, Pietro Lombardi2, Nico Gruhler3, Wolfram Pernice3, Costanza Toninelli2, and Oliver Benson1 — 1Inst.f.Physk, Humboldt Universitaet zu Berlin, Germany — 2LENS, Florence, Italy — 3KIT, Karlsruhe, Germany
Organic dye molecules are well-suited candidates for hybrid single photon sources and optical nonlinearities for future integrated photonics and quantum photonic circuits. Embedded in a crystal host matrix, dye molecules are very bright stable single photon emitters with very narrow zero-phonon-line emission at cryogenic temperatures.
In order to integrate single photon emission into nano-optical structures, coupling of single emitters to waveguides, resonators, and plasmonic structures is investigated thoroughly by many research groups. Our studies focus on single DBT molecules in a protective anthracene host matrix. The crystal matrix stabilizes the photon emission and reduces the intersystem crossing rates significantly, thereby reducing blinking and bleaching of the molecules under laser excitation. The robust thin-film shell enables mechanical nano-manipulation techniques and easy deposition onto our fabricated structures. We designed and fabricated SiN waveguides with optimized grating coupler ports, allowing us to confocally excite and detect molecules and also observe the coupled fluorescence into the waveguide structures. We are employing different photonic structures, e.g. tapered fibers, slot waveguides, and nano antennas, to compare and improve the coupling efficiencies of the single molecule emitters.