Spin selective filtering of polariton condensate flow

Spin-selective spatial filtering of propagating polariton condensates, using a controllable spin-dependent gating barrier, in a one-dimensional semiconductor microcavity ridge waveguide is reported. A nonresonant laser beam provides the source of propagating polaritons, while a second circularly pol...

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Veröffentlicht in:Applied physics letters 2015-07, Vol.107 (1)
Hauptverfasser: Gao, T., Antón, C., Liew, T. C. H., Martín, M. D., Hatzopoulos, Z., Viña, L., Eldridge, P. S., Savvidis, P. G.
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Sprache:eng
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Zusammenfassung:Spin-selective spatial filtering of propagating polariton condensates, using a controllable spin-dependent gating barrier, in a one-dimensional semiconductor microcavity ridge waveguide is reported. A nonresonant laser beam provides the source of propagating polaritons, while a second circularly polarized weak beam imprints a spin dependent potential barrier, which gates the polariton flow and generates polariton spin currents. A complete spin-based control over the blocked and transmitted polaritons is obtained by varying the gate polarization.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4926418