Signal polariton switch achieved by controlling the phases of excitation fields

We present a theoretical investigation of an unusual mechanism of excitation field effects that acts selectively on polariton semiconductor microcavities. By varying the pump excitation intensity and adjusting the phases, such a configuration enables excitations of polariton condensate to occur. The excitation was confirmed for various matching conditions below and above the pump excitation threshold, yet the signal, pump, and idler states all have the same occupation times in the low pump region. Signal polariton switch-on (off) has been realized for low field intensity, and the associated threshold pump excitation has been calculated for many probe beams, highlighting the importance of signal occupation and phase influence factors. When the ratio of pump intensity to pump threshold matches the square root of the ratio of signal to idler intensities, the influence of the pump excitation phase peaks reaches a maximum. As a result of the intensities of excitation field effects, signal polariton switching occurs in a matter of picoseconds, implying the importance of spin optoelectronic devices.

Automated summary

We present a theoretical investigation of an unusual mechanism of excitation field effects on polariton semiconductor microcavities. By adjusting the pump excitation intensity and phase, the excitation of polariton condensates can be achieved. The importance of signal occupation and phase influence factors in signal polariton switching is highlighted.