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HL: Fachverband Halbleiterphysik

HL 74: Poster IIIA

HL 74.1: Poster

Donnerstag, 19. März 2020, 15:00–17:30, P2/2OG

Radiation-modulation of mono-layer MoSe2 nano emitters by LSPs — •Yuhao Zhang and Stefan Linden — Physikalisches Institut, Universität Bonn

Nano emitters based on transition metal dichalcogenide (TMDC) monolayers is considered as a potential resource for nano-photonic technologies. It is necessary to develop methods to optimize the radiation of this kind of nano emitters. Localized surface plasmons (LSPs) is considered as one of the best choice due to it is a no- propagation method and it is convenient to be controlled. Here, we produced MoSe2 monolayers by mechanical exfoliation, and then the monolayers are transferred to plasmonic nanoantennas by PDMS stamps. In order to change the resonance of LSPs that they produced, the sizes of the nanoantennas are changed from 100 nm to 400 nm. Then the radiation of the nano emitters coupled to different resonance LSPs are measured by a PL microscope. The result shows that the radiation of mono-layer MoSe2 nano emitters is modulated by the resonance of LSPs. When the LSP is resonance with radiation of the nano emitters, the radiation is enhanced 1.5 times compared to the monolayers on the glass substrate. With the resonance of LSPs is off, the radiation of nano emitters descend continuously until they are near-resonance with high-order LSPs. Our results agree well with the FEM simulations. This effect provides an efficient tool to optimize the radiation of TMDC nano emitters.