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HL: Fachverband Halbleiterphysik

HL 37: Materials and devices for quantum technology II

HL 37.8: Vortrag

Donnerstag, 30. März 2023, 11:45–12:00, JAN 0027

Determination of optical dipole orientation of quantum emitters in monolayer MoS₂ — •Anna Herrmann, Katja Barthelmi, Lukas Sigl, Mirco Troue, Thomas Klokkers, Jonathan Finley, Christoph Kastl, and Alexander Holleitner — Walter Schottky Institut and Physics Department, Technische Universität München, Am Coulombwall 4a, Garching bei München, Germany

Single photon emitters in 2D materials are interesting for applications in quantum science and technology. Recently, we demonstrated that defect-based single photon emitters can be site-selectively generated in monolayer MoS₂ van der Waals heterostacks by a focused beam of helium ions with an overall positioning accuracy below 10 nm. The emitters show a luminescence with narrow emission lines around 1.75 eV. To determine the optical dipole orientation of the emitters we discuss the far-field photoluminescence intensity distribution of the defect emission in a back-focal plane geometry. The data is compared to simulations by an analytical model, which describes the dipolar emission pattern in the dielectric environment of the heterostructure. The demonstrated approach allows determining the relative contributions for in- and out-of-plane transition dipole moments of quantum emitters.