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Akimov, Alexey

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Akimov

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Alexey

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Akimov, Alexey
Author's Publications: search.filters.isAuthorOfPublication.23316aad-0747-4b68-836e-4d1ed9fa0e2c

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    Coupling a Single Trapped Atom to a Nanoscale Optical Cavity
    (American Association for the Advancement of Science (AAAS), 2013) Thompson, Jeffrey Douglas; Tiecke, Tobias; de Leon, Nathalie Pulmones; Feist, J.; Akimov, Alexey; Gullans, Michael John; Zibrov, Alexander; Vuletic, V.; Lukin, Mikhail
    Hybrid quantum devices, in which dissimilar quantum systems are combined in order to attain qualities not available with either system alone, may enable far-reaching control in quantum measurement, sensing, and information processing. A paradigmatic example is trapped ultracold atoms, which offer excellent quantum coherent properties, coupled to nanoscale solid-state systems, which allow for strong interactions. We demonstrate a deterministic interface between a single trapped rubidium atom and a nanoscale photonic crystal cavity. Precise control over the atom's position allows us to probe the cavity near-field with a resolution below the diffraction limit and to observe large atom-photon coupling. This approach may enable the realization of integrated, strongly coupled quantum nano-optical circuits.
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    Tailoring Light-Matter Interaction with a Nanoscale Plasmon Resonator
    (American Physical Society (APS), 2012) de Leon, Nathalie Pulmones; Shields, Brendan John; Yu, C; Englund, Dirk E.; Akimov, Alexey; Lukin, Mikhail; Park, Hongkun
    We propose and demonstrate a new approach for achieving enhanced light-matter interactions with quantum emitters. Our approach makes use of a plasmon resonator composed of defect-free, highly crystalline silver nanowires surrounded by patterned dielectric distributed Bragg reflectors. These resonators have an effective mode volume (Veff) 2 orders of magnitude below the diffraction limit and a quality factor (Q) approaching 100, enabling enhancement of spontaneous emission rates by a factor exceeding 75 at the cavity resonance. We also show that these resonators can be used to convert a broadband quantum emitter to a narrow-band single-photon source with color-selective emission enhancement.
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    All-Optical Sensing of a Single-Molecule Electron Spin
    (American Chemical Society (ACS), 2014) Sushkov, Alexander; Chisholm, N.; Lovchinsky, I.; Kubo, M.; Lo, P. K.; Bennett, Steven; Hunger, D.; Akimov, Alexey; Walsworth, Ronald; Park, H.; Lukin, Mikhail
    We demonstrate an all-optical method for magnetic sensing of individual molecules in ambient conditions at room temperature. Our approach is based on shallow nitrogen-vacancy (NV) centers near the surface of a diamond crystal, which we use to detect single paramagnetic molecules covalently attached to the diamond surface. The manipulation and readout of the NV centers is all-optical and provides a sensitive probe of the magnetic field fluctuations stemming from the dynamics of the electronic spins of the attached molecules. As a specific example, we demonstrate detection of a single paramagnetic molecule containing a gadolinium (Gd3+) ion. We confirm single-molecule resolution using optical fluorescence and atomic force microscopy to colocalize one NV center and one Gd3+-containing molecule. Possible applications include nanoscale and in vivo magnetic spectroscopy and imaging of individual molecules.