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Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 24: Poster Session II

HL 24.36: Poster

Tuesday, March 13, 2018, 18:30–20:30, Poster F

Directional optical switching and transistor functionality using optical parametric oscillation in a spinor polariton fluid — •Matthias Pukrop1, Przemyslaw Lewandowski1, Samuel M. H. Luk2, Chris K. P. Chan3, P.T. Leung3, N.H. Kwong4, Rolf Binder2,4, and Stefan Schumacher1,41Physics Department and CeOPP, Universität Paderborn, 33098 Paderborn, Germany — 2Department of Physics, University of Arizona, Tucson, AZ 85721, USA — 3Department of Physics, The Chinese University of Hongkong, Hongkong SAR, China — 4College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA

Over the past decade, spontaneously emerging patterns in the density of polaritons in semiconductor microcavities [1] were found to be a promising candidate for all-optical switching. But recent approaches were mostly restricted to scalar fields, did not benefit from the polariton’s unique spin-dependent properties, and utilized switching based on hexagon far-field patterns with 60 beam switching (i.e. in the far field the beam propagation direction is switched by 60). Since hexagon far-field patterns are challenging, we present here an approach for a linearly polarized spinor field, that allows for a transistor-like (e.g., crucial for cascadability) orthogonal beam switching, i.e. in the far field the beam is switched by 90. We show that switching specifications such as amplification and speed can be adjusted using only optical means [2].

[1] V. Ardizzone et al., Scientific Reports 3, 3016 (2013)

[2] P. Lewandowski et al., Opt. Express 25, 31056-31063 (2017)

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