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Regensburg 2016 – scientific programme

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DS: Fachverband Dünne Schichten

DS 5: Two-dimensional Materials
(Joint session of DS and HL, organized by HL)

DS 5.4: Talk

Monday, March 7, 2016, 10:15–10:30, H16

Second-harmonic generation in MoS2 monolayers coupled to resonant nanoantennas — •Franz Johannes Friedrich Löchner1, Stefan Fasold1, Antony George2, Paul Douglas Harrison1, Christoph Menzel1, Andrey Turchanin2, Isabelle Staude1, Falk Eilenberger3, Frank Setzpfandt1, and Thomas Pertsch11Institute of Applied Physics, Abbe Center of Photonics , Friedrich-Schiller-Universität Jena, 07743 Jena, Germany — 2Institute of Physical Chemistry, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany — 3Fraunhofer Institute for Applied Optics and Precision Engineering, 07745 Jena, Germany

Two-dimensional monolayers of transition metal dichalcogenides (TMDs), a new class of direct band-gap semiconductors, recently have attracted a lot of attention due to their pronounced excitonic emission lines and strong second-order nonlinearity.

Coupling TMDs to resonant nanoantennas allows to further enhance these effects by concentrating the exciting optical field into a small volume. Such enhancement has been shown for excitonic emission using plasmonic nanoantennas. However, nonlinear optical effects in TMD-nanoantenna systems have not been studied yet.

In our contribution, we report on experimental investigations of second-harmonic generation in molybdenum disulfide (MoS2) monolayers coupled to nanoantennas, resonant at the exciting fundamental-harmonic wavelength. Polarization resolved measurements show the profound impact which the presence of the nanoantenna has on the second-harmonic radiation generated by the MoS2-monolayer.

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