Counter-directional polariton coupler

We report on an on-chip routing device for propagating condensates of exciton-polaritons. This counter-directional coupler implements signal control by a photonic microdisk potential, which couples two lithographically defined waveguides and reverses the condensate's propagation direction. By v...

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Bibliographic Details
Published in:Applied physics letters 2019-02, Vol.114 (6)
Main Authors: Klaas, M., Beierlein, J., Rozas, E., Klembt, S., Suchomel, H., Harder, T. H., Winkler, K., Emmerling, M., Flayac, H., Martín, M. D., Viña, L., Höfling, S., Schneider, C.
Format: Article
Language:English
Subjects:
Applied physics
Condensates
Directional couplers
Photonics
Polaritons
Streak cameras
Tunnel diodes
Wave propagation
Waveguides
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Summary:We report on an on-chip routing device for propagating condensates of exciton-polaritons. This counter-directional coupler implements signal control by a photonic microdisk potential, which couples two lithographically defined waveguides and reverses the condensate's propagation direction. By varying the structural sizes, we utilize the conjunction of the different dimensionalities to additionally evidence the functionality of a polaritonic resonant tunnel diode. Furthermore, we investigate the ultra-fast dynamics of the device via ps-resolved streak camera measurements, which is distinctive for the polariton platform. This scalable, all-directional coupler element is a central building block for compact non-linear on-chip photonic architectures.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5067247