Polariton Condensation in a One-Dimensional Disordered Potential

Manni, Francesco; Lagoudakis, Konstantinos G.; Piętka, B.; Fontanesi, Luca; Wouters, Michiel; Savona, Vincenzo; André, R.; Deveaud-Plédran, Benoît

doi:10.1103/physrevlett.106.176401

Cited by 49 publications

(41 citation statements)

References 26 publications

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“…This strain may be relieved via dislocations which form a characteristic crosshatch pattern. 8 Disorder in microcavities strongly modulates the potential experienced by polaritons through the photonic component and may result in partial 9 or even total polariton confinement. 10 Similarly, the Rabi splitting exhibited by a microcavity is dependent upon the number and the confinement energy (depth) and hence exciton oscillator strength of the QWs.…”

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confidence: 99%

Design and characterization of high optical quality InGaAs/GaAs/AlGaAs-based polariton microcavities

Tinkler

Walker

Clarke

et al. 2015

Applied Physics Letters

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The presence of dislocations arising from strain relaxation strongly affects polaritons through their photonic component and ultimately limits experiments involving polariton propagation. In this work, we investigate the range of growth parameters to achieve high optical quality GaAs/AlxGa1−xAs-based microcavities containing strained InxGa1−xAs quantum wells and using differential interference contrast (Nomarski) microscopy deduce a design rule for homogeneous versus disordered structures. We illustrate the effect of disorder by contrasting observations of polariton condensates in relaxed and unrelaxed microcavities. In our optimized device, we generate a polariton condensate and deduce a lifetime for the interacting polariton fluid of 39 ± 2 ps.

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confidence: 99%

Design and characterization of high optical quality InGaAs/GaAs/AlGaAs-based polariton microcavities

Tinkler

Walker

Clarke

et al. 2015

Applied Physics Letters

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“…It is interesting that, in contrast to the experimentally reported algebraic decay in 2D polariton systems [15,36], the spatial coherence function of a one dimensional condensate is indicated to reach a constant plateau at large distances [16,37,38]. However, in these reports the clarity of this behavior is either obscured by large experimental errors resulting from the applied double slit technique [38] or by strong oscillations in the correlation function related to inhomogeneities of the 1D trap [16] and a comparably short long-range order in the range of 10 μm [37]. For the purposes of assessing the long-range coherence behavior, the 1D polariton condensate in our experiments may roughly be characterized as a finite area but uniform 1D condensate due to its smooth steady-state profile.…”

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confidence: 77%

“…In particular, polariton condensation in one dimensional channels has drawn special attention. It was demonstrated that polaritons trapped in a channel reveal the appearance of ODLRO in the condensation regime [16]. Moreover, the droplets of BECs in such systems can propagate over macroscopic distances, preserving their coherence properties and allowing for the efficient manipulation [17].…”

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confidence: 99%

Spatial Coherence Properties of One Dimensional Exciton-Polariton Condensates

et al. 2014

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In this work, we combine a systematic experimental investigation of the power-and temperaturedependent evolution of the spatial coherence function, g ð1Þ ðrÞ, in a one dimensional exciton-polariton channel with a modern microscopic numerical theory based on a stochastic master equation approach. The spatial coherence function g ð1Þ ðrÞ is extracted via high-precision Michelson interferometry, which allows us to demonstrate that in the regime of nonresonant excitation, the dependence g ð1Þ ðrÞ reaches a saturation value with a plateau, which is determined by the intensity of the pump and effective temperature of the crystal lattice. The theory, which was extended to allow for treating incoherent excitation in a stochastic frame, matches the experimental data with good qualitative and quantitative agreement. This allows us to verify the prediction that the decay of the off-diagonal long-range order can be almost fully suppressed in one dimensional condensate systems.

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“…Only recently, polariton condensation was experimentally confirmed [4] and it paved the way to the study of many collective quantum phenomena in semiconductor microcavities, such as superfluid properties [5][6][7][8][9][10], or macroscopic phase coherence [11][12][13][14][15]. Many of these results were obtained after quasi-resonant excitation at the inflection point of the lower polariton branch (LPB), in the so-called optical parametric oscillator (OPO) configuration.…”

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confidence: 99%

Role of supercurrents on vortices formation in polariton condensates

Antón¹,

Tosi²,

Martin³

et al. 2012

Opt. Express

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Observation of quantized vortices in non-equilibrium polariton condensates has been reported either by spontaneous formation and pinning in the presence of disorder or by imprinting them onto the signal or idler of an optical parametric oscillator (OPO). Here, we report a detailed analysis of the creation and annihilation of polariton vortex-antivortex pairs in the signal state of a polariton OPO by means of a short optical Gaussian pulse at a certain finite pump wave-vector. A time-resolved, interferometric analysis of the emission allows us to extract the phase of the perturbed condensate and to reveal the dynamics of the supercurrents created by the pulsed probe. This flow is responsible for the appearance of the topological defects when counter-propagating to the underlying currents of the OPO signal. A 21, 367 (2004). 32. For the supercurrent calculations, eventual phase jumps between 0 and 2π, where the gradient of the phase is not well defined, (see, for example the region between the white arrows in the Fig. 3 (a)), are circumvented using ∇Φ s (r,t) = −i∇ exp (iΦ s (r,t)) / exp (iΦ s (r,t)).

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Polariton Condensation in a One-Dimensional Disordered Potential

Cited by 49 publications

References 26 publications

Design and characterization of high optical quality InGaAs/GaAs/AlGaAs-based polariton microcavities

Design and characterization of high optical quality InGaAs/GaAs/AlGaAs-based polariton microcavities

Spatial Coherence Properties of One Dimensional Exciton-Polariton Condensates

Role of supercurrents on vortices formation in polariton condensates

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