Growth of optical-quality anthracene crystals doped with dibenzoterrylene for controlled single photon production

Major, Kyle D.; Lien, Yu-Hung; Polisseni, Claudio; Grandi, Samuele; Kho, Kiang Wei; Clark, Alex S.; Hwang, J.; Hinds, E. A.

doi:10.1063/1.4928500

Cited by 26 publications

(29 citation statements)

References 22 publications

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“…This arrangement allows the galvo mirrors to scan the focal spot on the sample, while always filling the aperture of the objective to produce a Gaussian spot of ∼720nm FWHM. The DBT-doped anthracene crystal, shown inset in figure 4(a), is grown by co-sublimation [27], then placed on a glass coverslip and protected by a thin, spin-coated layer of polyvinyl alcohol (PVA). This sample is held in place using a vacuum chuck.…”

Section: Methodsmentioning

confidence: 99%

Efficient excitation of dye molecules for single photon generation

et al. 2018

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A reliable single photon source is required for many aspects of quantum technology. Organic molecules are attractive for this application because they can have high quantum yield and can be photostable, even at room temperature. To generate a photon with high probability, a laser must excite the molecule efficiently. We develop a simple model for that efficiency and discuss how to optimise it. We demonstrate the validity of our model through experiments on a single dibenzoterrylene (DBT) molecule in an anthracene crystal. We show that the excitation probability cannot exceed 75% at room temperature, but can increase to over 99% if the sample is cooled to liquid nitrogen temperature. The possibility of high photon generation efficiency with only modest cooling is a significant step towards a reliable photon source that is simple and practical.

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Section: Methodsmentioning

confidence: 99%

Efficient excitation of dye molecules for single photon generation

et al. 2018

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“…A fit using the function A e −t/τ gave the lifetime of the excited state of the molecule as τ = 2.74(2) ns. This is slightly shorter than the expected 3-6 ns for DBT in anthracene 2,3,12,[26][27][28] . This could be because the decay rate of the molecule is enhanced by its coupling to the waveguide (see Supplementary Materials), or possibly that the non-radiative decay rate was increased.…”

Section: Resultsmentioning

confidence: 58%

Hybrid plasmonic waveguide coupling of photons from a single molecule

Grandi¹,

Nielsen²,

Cambiasso³

et al. 2019

APL Photonics

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We demonstrate the emission of photons from a single molecule into a hybrid gap plasmon waveguide (HGPW). Crystals of anthracene, doped with dibenzoterrylene (DBT), are grown on top of the waveguides. We investigate a single DBT molecule coupled to the plasmonic region of one of the guides, and determine its in-plane orientation, excited state lifetime and saturation intensity. The molecule emits light into the guide, which is remotely out-coupled by a grating. The second-order autocorrelation and cross-correlation functions show that the emitter is a single molecule and that the light emerging from the grating comes from that molecule. The coupling efficiency is found to be β W G = 11.6(1.5)%. This type of structure is promising for building new functionality into quantum-photonic circuits, where localised regions of strong emitter-guide coupling can be interconnected by low-loss dielectric guides.

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“…The nanocapsules do not require any further treatment to survive continuous high-power excitation and ambient conditions for many hours and can emit near lifetime-limited photons at low temperature. The DBT shows no change in optical properties compared to already established growth methods, such as spin-coating [17], re-precipitation [5], melt-growth [4] and co-sublimation [12] showing there are no adverse effects due to this encapsulation method. Microscopy shows a distribution of nanocapsule size with a mean of 960 ± 20 nm, however previous work has shown promise using commercially available syringe pore-filters to select smaller nanocrystals [5], and this could be used for greater size selectivity of nanocapsules.…”

Section: Resultsmentioning

confidence: 84%

“…The exemplary molecule dibenzoterrylene (DBT) embedded in an anthracene (Ac) host matrix shows many of the characteristics of an ideal emitter. Initial work used co-sublimation methods [9][10][11][12] to produce macroscopic crystals, which show excellent spectral properties. However, to achieve the high collection efficiency required for applications the emitters need to be incorporated in nanophotonic devices.…”

Section: Introductionmentioning

confidence: 99%

Polymer-encapsulated organic nanocrystals for single photon emission

Schofield¹,

Bogusz²,

Hoggarth³

et al. 2020

Opt. Mater. Express

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We demonstrate an emulsion-polymerisation technique to embed dibenzoterrylenedoped anthracene nanocrystals in polymethyl methacrylate (PMMA) nanocapsules. The nanocapsules require no further protection after fabrication and are resistant to sublimation compared to unprotected anthracene. The room temperature emission from single dibenzoterrylene molecules is stable and when cooled to cryogenic temperatures we see no change in their excellent optical properties compared to existing growth methods. We also show emission from nanocapsules embedded in a thin layer of titanium dioxide, highlighting their potential for integration into hybrid nanophotonic devices.

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Growth of optical-quality anthracene crystals doped with dibenzoterrylene for controlled single photon production

Cited by 26 publications

References 22 publications

Efficient excitation of dye molecules for single photon generation

Efficient excitation of dye molecules for single photon generation

Hybrid plasmonic waveguide coupling of photons from a single molecule

Polymer-encapsulated organic nanocrystals for single photon emission

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