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Showing 1–16 of 16 results
Advanced filters: Author: A. N. Vamivakas Clear advanced filters

  • A promising approach to realizing a practical quantum bit scheme is the optical control of single electron spins in quantum dots. The reliable preparation and manipulation of the quantum states of such spins have been demonstrated recently. The final challenge is to carry out single-shot measurements of the electron spin without interfering with it. A technique has now been developed that enables such measurement, by coupling one quantum dot to another to produce a quantum dot molecule.

    • A. N. Vamivakas
    • C.-Y. Lu
    • M. Atatüre
    Research
    Nature
    Volume: 467, P: 297-300

  • Owing to the presence of strongly bound excitons and degenerate valleys, monolayer transition metal dichalcogenides show promise for valleytronic applications. Here, the authors embed monolayer WSe2 in a monolithic dielectric cavity, and observe room-temperature valley coherence of valley-polaritons.

    • L. Qiu
    • C. Chakraborty
    • A. N. Vamivakas
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-5

  • The negatively charged boron vacancy in hBN shows promise as a quantum sensor, but, until recently, the focus has been on its ground-state properties. Here, the authors report temperature-dependent spin-resonance optical spectroscopy of the orbital excited state.

    • Nikhil Mathur
    • Arunabh Mukherjee
    • Gregory D. Fuchs
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Quantum emitters in atomically thin materials host optically addressable single spins. Here, the authors demonstrate spin selectivity in the preparation of the spin-valley state of site-controlled localized single holes in CrI3/WSe2 heterostructures.

    • Arunabh Mukherjee
    • Kamran Shayan
    • A. Nick Vamivakas
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-8

  • A study of the strong coupling of different exciton species in two-dimensional molybdenum diselenide in a cavity uncovers the rich many-body physics and may lead to new devices.

    • S. Dhara
    • C. Chakraborty
    • A. N. Vamivakas
    Research
    Nature Physics
    Volume: 14, P: 130-133

  • A phonon laser based on an optically levitated silica nanosphere is demonstrated. A lasing threshold—a phase transition from Brownian motion to coherent oscillation—is observed when the modulation depth of the trapping beam power is increased.

    • Robert M. Pettit
    • Wenchao Ge
    • A. Nick Vamivakas
    Research
    Nature Photonics
    Volume: 13, P: 402-405

  • Looped trajectories of photons in a three-slit interference experiment could modify the resulting intensity pattern, but they are experimentally hard to observe. Here the authors exploit surface plasmon excitations to increase their probability, measuring their contribution and confirming Born’s rule.

    • Omar S Magaña-Loaiza
    • Israel De Leon
    • Robert W. Boyd
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6

  • A hybrid nano-optomechanical system — a nanodiamond levitated in an optical dipole trap that contains a single nitrogen vacancy centre — shows the ability to simultaneously control multidimensional optical, phononic and spin degrees of freedom.

    • Levi P. Neukirch
    • Eva von Haartman
    • A. Nick Vamivakas
    Research
    Nature Photonics
    Volume: 9, P: 653-657

  • Two experiments observe the so-called ‘Mollow triplet’ in the emission spectrum of a quantum dot—originating from resonantly driving a dot transition—and demonstrate the potential of these systems to act as single-photon sources and as a readout modality for electron-spin states.

    • A. Nick Vamivakas
    • Yong Zhao
    • Mete Atatüre
    Research
    Nature Physics
    Volume: 5, P: 198-202

  • Ferromagnetism with a Curie temperature above room temperature in 2D materials is highly desirable for practical spintronics applications. Here, the authors demonstrate such phenomenon in monolayer MoS2 via in situ iron-doping and measured local magnetic field strength up to 0.5 ± 0.1 mT.

    • Shichen Fu
    • Kyungnam Kang
    • Eui-Hyeok Yang
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-8

  • In semiconductor quantum dots, interactions between the confined electrons and the surrounding reservoir of nuclear spins limit the attainable electron-spin coherence. But the nuclear-spin reservoir can also take a constructive role, as it facilitates the locking of the optical quantum-dot resonance to the changing frequency of an external driving laser, as an experiment now demonstrates.

    • C. Latta
    • A. Högele
    • A. Imamoglu
    Research
    Nature Physics
    Volume: 5, P: 758-763

  • Atom-like quantum emitters in solids have emerged as promising building blocks for quantum information processing. In this Review, recent advances in three leading material platforms—diamond, silicon carbide and atomically thin semiconductors—are summarized, with a focus on applications in quantum networks

    • Mete Atatüre
    • Dirk Englund
    • Joerg Wrachtrup
    Reviews
    Nature Reviews Materials
    Volume: 3, P: 38-51