Spin selective filtering of polariton condensate flow
Liew, Timothy Chi Hin
Martín, M. D.
Eldridge, P. S.
Savvidis, P. G.
Date of Issue2015
School of Physical and Mathematical Sciences
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.
Applied Physics Letters
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