Limits...
Exciton-photon correlations in bosonic condensates of exciton-polaritons.

Kavokin AV, Sheremet AS, Shelykh IA, Lagoudakis PG, Rubo YG - Sci Rep (2015)

Bottom Line: Exciton-polaritons are mixed light-matter quasiparticles.We have developed a statistical model describing stochastic exciton-photon transitions within a condensate of exciton polaritons.We discuss implications of this effect for the quantum statistics of photons emitted by polariton lasers.

View Article: PubMed Central - PubMed

Affiliation: 1] School of Physics and Astronomy, University of Southampton, SO 171 BJ Southampton, United Kingdom [2] Russian Quantum Center, Novaya 100, 143025 Skolkovo, Moscow Region, Russia [3] Spin Optics Laboratory, St.-Petersburg State University, 198504 Peterhof, St.-Petersburg, Russia.

ABSTRACT
Exciton-polaritons are mixed light-matter quasiparticles. We have developed a statistical model describing stochastic exciton-photon transitions within a condensate of exciton polaritons. We show that the exciton-photon correlator depends on the rate of incoherent exciton-photon transformations in the condensate. We discuss implications of this effect for the quantum statistics of photons emitted by polariton lasers.

No MeSH data available.


Related in: MedlinePlus

(Color online) Showing evolution of some diagonal elements P(na, nb, t), as well as evolution of the average number of particles N and the energy per particle on insets.The panel (a) corresponds to the finite time of the exciton-photon conversion τxc = 5 ps, while the behavior in the absence of stochastic conversion is shown in the panel (b) The polariton condensate is initially in the coherent state with N = 10. The life-times of excitons and photons are τx = 40 ps and τc = 10 ps.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4495551&req=5

f3: (Color online) Showing evolution of some diagonal elements P(na, nb, t), as well as evolution of the average number of particles N and the energy per particle on insets.The panel (a) corresponds to the finite time of the exciton-photon conversion τxc = 5 ps, while the behavior in the absence of stochastic conversion is shown in the panel (b) The polariton condensate is initially in the coherent state with N = 10. The life-times of excitons and photons are τx = 40 ps and τc = 10 ps.

Mentions: In Fig. 3 we demonstrate the behaviour of several diagonal elements P(na, nb, t) of the density matrix as functions of time for the initial coherent distribution (15) and realistic exciton and photon lifetimes. In the panel (a) we account for the finite stochastic exciton-photon conversion time, while in the panel (b) the stochastic conversion is neglected. In the absence of stochastic processes there is an asymmetry in the behaviour of the density matrix elements P(na, nb, t) corresponding to the same number of polaritons N = na + nb, which is caused by the difference of exciton and photon lifetimes. The stochastic process affects noticeably this behavior, as it is seen in Fig. 3(a). Due to the transformations of photons to excitons and vice versa, the density matrix elements P(na, nb, t) ≈ P(nb, na, t) if t > τxc. The insets in Figs 3(a,b) show the calculated energy per particle. As expected, this energy exponentially tends to zero on the timescale of τxc [inset in Fig. 3(a)], while it is constant in the absence of the stochastic mixing [inset in Fig. 3(b)).


Exciton-photon correlations in bosonic condensates of exciton-polaritons.

Kavokin AV, Sheremet AS, Shelykh IA, Lagoudakis PG, Rubo YG - Sci Rep (2015)

(Color online) Showing evolution of some diagonal elements P(na, nb, t), as well as evolution of the average number of particles N and the energy per particle on insets.The panel (a) corresponds to the finite time of the exciton-photon conversion τxc = 5 ps, while the behavior in the absence of stochastic conversion is shown in the panel (b) The polariton condensate is initially in the coherent state with N = 10. The life-times of excitons and photons are τx = 40 ps and τc = 10 ps.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495551&req=5

f3: (Color online) Showing evolution of some diagonal elements P(na, nb, t), as well as evolution of the average number of particles N and the energy per particle on insets.The panel (a) corresponds to the finite time of the exciton-photon conversion τxc = 5 ps, while the behavior in the absence of stochastic conversion is shown in the panel (b) The polariton condensate is initially in the coherent state with N = 10. The life-times of excitons and photons are τx = 40 ps and τc = 10 ps.
Mentions: In Fig. 3 we demonstrate the behaviour of several diagonal elements P(na, nb, t) of the density matrix as functions of time for the initial coherent distribution (15) and realistic exciton and photon lifetimes. In the panel (a) we account for the finite stochastic exciton-photon conversion time, while in the panel (b) the stochastic conversion is neglected. In the absence of stochastic processes there is an asymmetry in the behaviour of the density matrix elements P(na, nb, t) corresponding to the same number of polaritons N = na + nb, which is caused by the difference of exciton and photon lifetimes. The stochastic process affects noticeably this behavior, as it is seen in Fig. 3(a). Due to the transformations of photons to excitons and vice versa, the density matrix elements P(na, nb, t) ≈ P(nb, na, t) if t > τxc. The insets in Figs 3(a,b) show the calculated energy per particle. As expected, this energy exponentially tends to zero on the timescale of τxc [inset in Fig. 3(a)], while it is constant in the absence of the stochastic mixing [inset in Fig. 3(b)).

Bottom Line: Exciton-polaritons are mixed light-matter quasiparticles.We have developed a statistical model describing stochastic exciton-photon transitions within a condensate of exciton polaritons.We discuss implications of this effect for the quantum statistics of photons emitted by polariton lasers.

View Article: PubMed Central - PubMed

Affiliation: 1] School of Physics and Astronomy, University of Southampton, SO 171 BJ Southampton, United Kingdom [2] Russian Quantum Center, Novaya 100, 143025 Skolkovo, Moscow Region, Russia [3] Spin Optics Laboratory, St.-Petersburg State University, 198504 Peterhof, St.-Petersburg, Russia.

ABSTRACT
Exciton-polaritons are mixed light-matter quasiparticles. We have developed a statistical model describing stochastic exciton-photon transitions within a condensate of exciton polaritons. We show that the exciton-photon correlator depends on the rate of incoherent exciton-photon transformations in the condensate. We discuss implications of this effect for the quantum statistics of photons emitted by polariton lasers.

No MeSH data available.


Related in: MedlinePlus