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 Schumacher1,4 — 1Physics 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)