Optical manipulation of polariton in semiconductor microstructures
Félix Marsault, French National Center for Scientific Research
Cavity polaritons are bosonic quasiparticles arising from the strong coupling between photons and excitons. They can massively occupy a single quantum state in the regime of polariton lasing [1], showing particular properties such as long coherence times [1], long range spatial coherence [1] and a linearly polarized emission [1,2,3]. Moreover, they possess strong excitonic nonlinearities and thus provide a new platform for elliptical photonic manipulation, with the demonstration of a polariton spin switch [4], polariton transistors [5] and the proposal of other proof-of-principle operations for elliptical integrated logic circuits [6]. I will first present our work on the coherence and polarization properties of polarity lasers. We use a streak camera in the single shot regime to measure second order photon correlations with a picosecond resolution. We show a stochastic initialization of the polarization followed by a precession around an effective magnetic field inside the cavity. The second part of this talk will be dedicated to the demonstration of polarity devices with an all-optical control. These devices comprise a 0D resonator coupled to 1D input and output waveguides. We demonstrate the operation of a polariton router [Fig. 1(b,c)] and a remotely controlled optical bistability.