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Drag effects in a system of electrons and microcavity polaritons

机译:电子和微腔极化子系统中的拖曳效应

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The theory of the drag effects in the system of spatially separated electrons and excitons in coupled quantum wells (QWs) embedded in an optical microcavity is developed. It is shown that at low temperature an electron current induces the polariton flow, therefore, a transport of photons along the cavity. However, the electron current dragged by the polariton flow is strongly suppressed below polariton superfluid transition temperature and hence, the strong suppression of the induced electron current indicates the superfluidity of polaritons. Therefore, the transport properties of polaritons can be investigated by measuring the current or voltage in the electron subsystem. At high temperatures, we study the exciton-electron drag effects. At high-temperatures regime, from one hand, the existence of the electric current in an electron QW induces the exciton flow in the other QW, from the other hand, the electron current in one QW induces the exciton flow in the other QW via the drag of excitons by the electrons. The drag coefficients for the polariton-electron systems are calculated and analyzed. We discuss the possible experimental observation of the drag effects in the system of electrons and microcavity polaritons, that also allow to observe the cavity polaritons superfluidity.%Oleg L. Berman;Roman Ya. Kezerashvili;Yurii E. Lozovik;
机译:建立了嵌入在光学微腔中的耦合量子阱(QW)中空间分离的电子和激子系统中的拖曳效应的理论。结果表明,在低温下,电子电流会引起极化子流,因此,光子会沿着空腔传输。然而,在极化子超流体转变温度以下,被极化子流拖曳的电子电流受到强烈抑制,因此,对感应电子电流的强烈抑制表明极化子具有超流体性。因此,可以通过测量电子子系统中的电流或电压来研究极化子的传输特性。在高温下,我们研究了激子-电子拖曳效应。在高温状态下,一方面,电子QW中电流的存在引起另一个QW中的激子流,另一方面,一个QW中的电子电流经由另一个QW引起另一个中子的激子流。电子激子的阻力。计算和分析了极化子-电子系统的阻力系数。我们讨论了电子和微腔极化子在系统中的拖曳效应的可能的实验观察,这也允许观察空穴极化子的超流动性。%Oleg L. Berman; Roman Ya。 Kezerashvili; Yurii E. Lozovik;

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