期刊
PHYSICAL REVIEW B
卷 89, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.235312
关键词
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资金
- Spanish FPU scholarships
- Greek GSRT program ARISTEIA
- EU
- Spanish MEC [MAT2011-22997]
- CAM [S-2009/ESP-1503]
- INDEX [289968]
We present a time-resolved photoluminescence (PL) study in real and momentum space of a polariton condensate switch in a quasi-one-dimensional semiconductor microcavity. The polariton flow across the ridge is gated by excitons inducing a barrier potential due to repulsive interactions. A study of the device operation dependence on the power of the pulsed gate beam obtains a satisfactory compromise for the on-off signal ratio and switching time of the order of 0.3 and similar to 50 ps, respectively. The opposite transition is governed by the long-lived gate excitons, consequently, the off-on switching time is similar to 200 ps, limiting the overall operation speed of the device to similar to 3 GHz. The experimental results are compared to numerical simulations based on a generalized Gross-Pitaevskii equation, taking into account incoherent pumping, decay, and energy relaxation within the condensate.
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