Reservoir-induced decoherence of resonantly excited confined polaritons

Ouellet-Plamondon, C.; Sallen, Gregory; Morier‐Genoud, F.; Oberli, D. Y.; Portella‐Oberli, M. T.; Deveaud, B.

doi:10.1103/physrevb.95.085302

Cited by 7 publications

(7 citation statements)

References 48 publications

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“…It has been observed in systems such as cold atoms [3], lasers [4], self-electro-optic effect devices (SEED) [5] and Fabry-Pérot cavities containing nonlinear materials [6,7]. Optical bistability in microcavity polaritons, the bosonic quasi-particles formed by the strong coupling of cavity photons and excitons, was previously demonstrated for resonant/quasi-resonant optical excitation [8][9][10][11][12][13], electrical biasing [14,15] and nonresonant electrical injection [16]. In resonantly pumped microcavity polaritons, bistability was described by a Kerr-like nonlinearity resulting from polariton-polariton interactions [9] and by employing an analogy with optical parametric oscillators [10].…”

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confidence: 98%

Optical Bistability under Nonresonant Excitation in Spinor Polariton Condensates

et al. 2018

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We realize bistability in the spinor of polariton condensates under nonresonant optical excitation and in the absence of biasing external fields. Numerical modeling of the system using the Ginzburg-Landau equation with an internal Josephson coupling between the two spin components of the condensate qualitatively describes the experimental observations. We demonstrate that polariton spin bistability strongly depends on the condensate's overlap with the exciton reservoir by tuning the excitation geometry and sample temperature. We obtain noncollapsing bistability hysteresis loops for a record range of sweep times, [10 μs, 1 s], offering a promising route to spin switches and spin memory elements.

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confidence: 98%

Optical Bistability under Nonresonant Excitation in Spinor Polariton Condensates

et al. 2018

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“…Lebedev et al have analyzed the effect of finite temperature on the coupling of quasi-equilibrium exciton-polariton condensates in a Josephson junction: They describe a second order phase transition between classical (thermal) and quantum regimes characterized by a temperature parameter related to the polariton-polariton interaction length [32]. Moreover, another recent experiment by Ouellet-Plamondon et al also gives the possibility to evaluate TC [33]. They reported on the dependence of polariton bistability with temperature, proposing that an increase in T leads to a significant incoherent population growth in the reservoir, which interacts with the polariton population.…”

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confidence: 99%

Temperature dependence of the coherence in polariton condensates

et al. 2018

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We present a time-resolved experimental study of the temperature effect on the coherence of traveling polariton condensates. The simultaneous detection of their emission both in real-and reciprocal-space allows us to fully monitor the condensates' dynamics. We obtain fringes in reciprocal-space as a result of the interference between polariton wavepackets (WPs) traveling with the same speed. The periodicity of these fringes is inversely proportional to the spatial distance between the interfering WPs. In a similar fashion, we obtain interference fringes in real-space when WPs traveling in opposite directions meet. The visibility of both real-and reciprocal-space interference fringes rapidly decreases with increasing temperature and vanishes. A theoretical description of the phase transition, considering the coexistence of condensed and non-condensed particles, for an out-of-equilibrium condensate such as ours is still missing. Yet a comparison with theories developed for atomic condensates allows us to infer a critical temperature for the BEC-like transition when the visibility goes to zero.

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“…Thus, it is the spectral overlap between the lower polariton mode and the probe beam that governs the transmission of the latter through the cavity. The presence of other carriers will also introduce a shift of the polariton mode [17][18][19][20]. As this shift directly translates to a modified probe beam transmission, the latter becomes a sensitive tool to detect the presence of other carriers and measure the strength of their interactions.…”

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confidence: 99%

Tracking Dark Excitons with Exciton Polaritons in Semiconductor Microcavities

et al. 2019

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Dark excitons are of fundamental importance for a wide variety of processes in semiconductors, but are difficult to investigate using optical techniques due to their weak interaction with light fields. We reveal and characterize dark excitons non-resonantly injected into a semiconductor microcavity structure containing InGaAs/GaAs quantum wells by a gated train of eight 100 fs-pulses separated by 13 ns by monitoring their interactions with the bright lower polariton mode. We find a surprisingly long dark exciton lifetime of more than 20 ns which is longer than the time delay between two consecutive pulses. This creates a memory effect that we clearly observe through the variation of the time-resolved transmission signal. We propose a rate equation model that provides a quantitative agreement with the experimental data. arXiv:1806.09422v2 [cond-mat.mes-hall]

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Reservoir-induced decoherence of resonantly excited confined polaritons

Cited by 7 publications

References 48 publications

Optical Bistability under Nonresonant Excitation in Spinor Polariton Condensates

Optical Bistability under Nonresonant Excitation in Spinor Polariton Condensates

Temperature dependence of the coherence in polariton condensates

Tracking Dark Excitons with Exciton Polaritons in Semiconductor Microcavities

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