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HL: Fachverband Halbleiterphysik

HL 13: Poster Session I

HL 13.65: Poster

Monday, March 12, 2018, 17:30–19:30, Poster B

Orbital Angular Momentum sorting of light emitted by exciton polariton vortices — •Marius Kahlert¹, Bernd Berger¹, Daniel Schmidt¹, Marc Aßmann¹, Martin Kamp², Christian Schneider², Sven Höfling², and Manfred Bayer¹ — ¹Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany — ²Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Germany

The nonlinear interaction of exciton polariton vortices is a subject of remarkable interest among the rich phenomenology of microcavity exciton polaritons. We generate exciton polariton vortices using light beams carrying orbital angular momentum (OAM) and demonstrate a method for monitoring the time dynamics of the exciton polariton vortex decay. Here the sample emission runs through a custom optical transformation, which translates the helical phase of OAM modes into a linear gradient and in principle enables a simultaneuos detection of all OAM modes. Finally the OAM sorted signal is resolved in time using a streak camera, granting insight into the decay dynamics of exciton polariton vortices.