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Showing 1–7 of 7 results
Advanced filters: Author: Gabriele Navickaite Clear advanced filters

  • The combination of fast photo-response and high gain plays a pivotal role in photodetector devices. Here the authors combine a colloidal quantum dot photodiode with a graphene phototransistor to overcome the speed, quantum efficiency and linear dynamic range limitations of available phototransistors.

    • Ivan Nikitskiy
    • Stijn Goossens
    • Gerasimos Konstantatos
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-8

  • Active control of optical fields at the nanoscale is difficult to achieve. Here, the authors fabricate an on-chip graphene NEMS suspended a few tens of nanometres above nitrogen vacancy centres and demonstrate electromechanical control of the photons emitted by electrostatic tuning of the graphene NEMS position.

    • Antoine Reserbat-Plantey
    • Kevin G. Schädler
    • Frank H. L. Koppens
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6

  • Graphene grain boundaries and charge inhomogeneities limit its electronic properties. Here the authors combine scanning near-field optical microscopy with electrical read-out to image these defects at the nanoscale under an encapsulation layer, and show that charges build up along the edges of the flake.

    • Achim Woessner
    • Pablo Alonso-González
    • Frank H. L. Koppens
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-7

  • A 300 GHz signal is generated by the combination of a low-noise stimulated Brillouin scattering process, dissipative Kerr soliton comb and optical-to-electrical conversion. A phase noise of −100 dBc Hz−1 is achieved at a Fourier frequency of 10 kHz.

    • Tomohiro Tetsumoto
    • Tadao Nagatsuma
    • Antoine Rolland
    Research
    Nature Photonics
    Volume: 15, P: 516-522

  • Experimental observation of intersubband transitions in van der Waals quantum wells is enabled by high spatial resolution imaging through near-field optical microscopy.

    • Peter Schmidt
    • Fabien Vialla
    • Frank H. L. Koppens
    Research
    Nature Nanotechnology
    Volume: 13, P: 1035-1041

  • Low phase-noise THz wave generation is in high demand for applications such as wireless communications and radars. Here, the authors generate low-noise THz waves via photodetection of the carrier of a Kerr frequency comb, which is repetition-rate stabilized using a two-wavelength delayed self-heterodyne interferometer.

    • Naoya Kuse
    • Kenji Nishimoto
    • Takeshi Yasui
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-8