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Showing 1–7 of 7 results
Advanced filters: Author: "Rudolf Bratschitsch" Clear advanced filters

  • Here, the authors perform Faraday rotation spectroscopy around the excitonic transitions in hBN-encapsulated WSe2 and MoSe2 monolayers, and interlayer excitons in MoS2 bilayers. They measure a large Verdet constant - 1.9 × 107 deg T−¹cm−¹ for monolayers, and attribute it to the giant oscillator strength and high g-factor of the excitons.

    • Benjamin Carey
    • Nils Kolja Wessling
    • Ashish Arora
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • Optical antennas are able to concentrate light on a scale much smaller then the wavelength. Bow–tie–shape nanostructures are one example. It is now possible to tune the response of such an antenna by precisely moving one half of the bow tie.

    • Jörg Merlein
    • Matthias Kahl
    • Rudolf Bratschitsch
    Research
    Nature Photonics
    Volume: 2, P: 230-233

  • p–n diodes can be fabricated from a single layer of WSe2 crystal.

    • Rudolf Bratschitsch
    News & Views
    Nature Nanotechnology
    Volume: 9, P: 247-248

  • Strain engineering can manipulate the propagation of excitons in atomically thin transition metal dichalcogenides. Here, the authors observe an anti-funnelling behavior, i.e., the exciton photoluminescence moves away from high-strain regions, and attribute it to the dominating role of propagating dark excitons.

    • Roberto Rosati
    • Robert Schmidt
    • Ermin Malic
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • Excitons, quasi-particles of bound electron-hole pairs, are at the core of the optoelectronic properties of layered transition metal dichalcogenides. Here, the authors unveil the presence of interlayer excitons in bulk van der Waals semiconductors, arising from strong localization and spin-valley coupling of charge carriers.

    • Ashish Arora
    • Matthias Drüppel
    • Rudolf Bratschitsch
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-6

  • Colloidal quantum dots are efficient nanoscopic light emitters with interesting applications from optoelectronics to biomedical imaging. Their polarizability has now been measured directly by probing the electronic response without electrical contacts.

    • Rudolf Bratschitsch
    • Alfred Leitenstorfer
    News & Views
    Nature Materials
    Volume: 5, P: 855-856