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Showing 1–16 of 16 results
Advanced filters: Author: J. P. Kotthaus Clear advanced filters

  • This work challenges the view of nucleation governing halide perovskite grain morphology, showing that most additives act post-nucleation by boosting ion mobility across grain boundaries, triggering grain coarsening, similar to post-processing effects.

    • Timo Maschwitz
    • Lena Merten
    • Kai Oliver Brinkmann
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-16

  • Advances in nanoelectromechanical systems have brought improvements in the quality factor of nanomechanical resonators, yet few low-loss transduction schemes exist at high temperature. Using non-dissipative dielectric coupling to a microwave cavity, Faustet al. present an integrated nanomechanical transducer.

    • T. Faust
    • P. Krenn
    • E.M. Weig
    ResearchOpen Access
    Nature Communications
    Volume: 3, P: 1-6

  • Minimizing vibrational energy loss between mechanical resonators and their supports in nanomechanical systems is highly desirable. Here, the authors use the tip of an atomic force microscope to press down on the clamping region of the resonator, so as to study and control energy loss of different vibrational modes.

    • Johannes Rieger
    • Andreas Isacsson
    • Eva M. Weig
    ResearchOpen Access
    Nature Communications
    Volume: 5, P: 1-6

  • Laser-driven resolved sideband cooling of the resonant vibrational mode of a toroidal microcavity represents another step towards reaching the quantum ground state.

    • A. Schliesser
    • R. Rivière
    • T. J. Kippenberg
    Research
    Nature Physics
    Volume: 4, P: 415-419

  • Optomechanical systems in which a high-quality optical resonator is coupled to a mechanical oscillator hold great promise for examining quantum effects in relatively large structures. As a step towards this, a silica microtoroid has now been cooled to the point that it has just 63 thermal quanta.

    • A. Schliesser
    • O. Arcizet
    • T. J. Kippenberg
    Research
    Nature Physics
    Volume: 5, P: 509-514

  • Coherent control of two flexural modes of a nanoscale oscillator using radiofrequency signals is now demonstrated. This oscillator is analogous to quantum two-level systems such as superconducting circuits and quantum dots, and therefore this technique raises the possibility of information processing using nanomechanical resonators.

    • T. Faust
    • J. Rieger
    • E. M. Weig
    Research
    Nature Physics
    Volume: 9, P: 485-488

  • Coupling a nanometre-scale oscillator to a micrometre-scale optical resonator provides a way of measuring the small-amplitude motion. The scheme is applied to silicon nitride ’strings’, but it could be extended to many other types of tiny vibrating structures.

    • G. Anetsberger
    • O. Arcizet
    • T. J. Kippenberg
    Research
    Nature Physics
    Volume: 5, P: 909-914

  • A design of on-chip optomechanical resonator that simultaneously maximizes a high mechanical Q-factor in the megahertz range and an ultrahigh optical finesse is reported. Studies of the mechanical properties of the cavity achieve the first direct observation of mechanical normal-mode coupling in a micromechanical system.

    • G. Anetsberger
    • R. Rivière
    • T. J. Kippenberg
    Research
    Nature Photonics
    Volume: 2, P: 627-633

  • A tiny disc-like structure on a silicon chip is simply illuminated by a conventional laser diode, and the resulting interaction between the laser light and the resonator gives rise to an optical frequency comb that emits in the infrared. The simplicity of the scheme, and the reduction in size, cost and power, should enhance the utility of optical frequency combs in a broad number of fields.

    • P. Del’Haye
    • A. Schliesser
    • T. J. Kippenberg
    Research
    Nature
    Volume: 450, P: 1214-1217

  • Clear Fano resonances that can be tuned by changing the device design or with applied voltages are observed. In the nonlinear regime, the visibility of the Fano interferences increases dramatically, which could be used as a sensitive probe of the degree of coupling between discrete states and the continuum, which is relevant for example for qubits where coupling to the environment needs to be kept to a minimum.

    • M. Kroner
    • A. O. Govorov
    • K. Karrai
    Research
    Nature
    Volume: 451, P: 311-314