Integration of atomically thin layers of transition metal dichalcogenides into high-Q, monolithic Bragg-cavities: An experimental platform for the enhancement of the optical interaction in 2D-materials

Heiko Knopf, Nils Lundt, Tobias Bucher, Sven Höfling, Sefaattin Tongay, Takashi Taniguchi, Kenji Watanabe, Isabelle Staude, Ulrike Schulz, Christian Schneider, Falk Eilenberger

    Research output: Contribution to journalArticle

    Abstract

    We demonstrate a new approach to integrate single layer MoSe2 and WSe2 flakes into monolithic all-dielectric planar high-quality micro-cavities. These distributed-Braggreflector (DBR) cavities may, e.g., be tuned to match the exciton resonance of the 2Dmaterials. They are highly robust and compatible with cryogenic and room-temperature operation. The integration is achieved by a customized ion-assisted physical vapor deposition technique, which does not degrade the optical properties of the 2D-materials. The monolithic 2D-resonator is shown to have a high Q-factor in excess of 4500. We use photoluminescence (PL) experiments to demonstrate that the coating procedure with a SiO2 coating on a prepared surface does not significantly alter the electrooptical properties of the 2D-materials. Moreover, we observe a resonance induced modification of the PL-spectrum for the DBR embedded flake. Our system thus represents a versatile platform to resonantly enhance and tailor light-matter-interaction in 2D-materials. The gentle processing conditions would also allow the integration of other sensitive materials into these highly resonant structures.

    Original languageEnglish (US)
    Pages (from-to)598-610
    Number of pages13
    JournalOptical Materials Express
    Volume9
    Issue number2
    DOIs
    StatePublished - Feb 1 2019

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    Transition metals
    Photoluminescence
    Coatings
    Physical vapor deposition
    Excitons
    Cryogenics
    Resonators
    Optical properties
    Ions
    Processing
    Experiments
    Temperature

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials

    Cite this

    Integration of atomically thin layers of transition metal dichalcogenides into high-Q, monolithic Bragg-cavities : An experimental platform for the enhancement of the optical interaction in 2D-materials. / Knopf, Heiko; Lundt, Nils; Bucher, Tobias; Höfling, Sven; Tongay, Sefaattin; Taniguchi, Takashi; Watanabe, Kenji; Staude, Isabelle; Schulz, Ulrike; Schneider, Christian; Eilenberger, Falk.

    In: Optical Materials Express, Vol. 9, No. 2, 01.02.2019, p. 598-610.

    Research output: Contribution to journalArticle

    Knopf, Heiko ; Lundt, Nils ; Bucher, Tobias ; Höfling, Sven ; Tongay, Sefaattin ; Taniguchi, Takashi ; Watanabe, Kenji ; Staude, Isabelle ; Schulz, Ulrike ; Schneider, Christian ; Eilenberger, Falk. / Integration of atomically thin layers of transition metal dichalcogenides into high-Q, monolithic Bragg-cavities : An experimental platform for the enhancement of the optical interaction in 2D-materials. In: Optical Materials Express. 2019 ; Vol. 9, No. 2. pp. 598-610.
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