Electroluminescence from spatially confined exciton polaritons in a textured microcavity

Winkler, K.; Schneider, C.; Fischer, Julian; Rahimi‐Iman, Arash; Amthor, M.; Forchel, A.; Reitzenstein, Stephan; Höfling, Sven; Kamp, M.

doi:10.1063/1.4777564

Cited by 16 publications

(13 citation statements)

References 25 publications

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“…Examples include weakly confining the excitons via mechanical strain [13] and periodic modulation of the optical modes via surface patterning [14,15]. Advanced techniques have been developed to embed apertures inside the cavity [16,17], which has created 0D polariton cells but polariton lasing has not been reported so far. Alternatively, 0D polariton systems were also created via direct etching of the vertical cavity into pillars [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Zero-dimensional polariton laser in a subwavelength grating-based vertical microcavity

et al. 2014

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Semiconductor exciton-polaritons in planar microcavities form coherent two-dimensional condensates in non-equilibrium. However, the coupling of multiple lower-dimensional polariton quantum systems, which are critical for polaritonic quantum device applications and novel cavity-lattice physics, has been limited in conventional cavity structures. Here, we demonstrate full non-destructive confinement of polaritons using a hybrid cavity composed of a single-layer subwavelength grating mirror and a distributed Bragg reflector. Single-mode polariton lasing was observed at a chosen polarization. The incorporation of a designable slab mirror in a conventional vertical cavity, when operating in the strong-coupling regime, enables the confinement, control and coupling of polariton gasses in a scalable fashion. This approach may open the door to experimental implementations of polariton-based quantum photonic devices and coupled cavity quantum electrodynamic systems. 2-4 Exciton-polaritons are formed via strong coupling between excitons and photons. Due to the excitonic component, the polaritons are massive, weakly interacting quasiparticles that feature strong nonlinearity and rich many-body physics.5 By mixing with the photon, polaritons have an effective mass that is 10 28 of the hydrogen atomic mass, and they are relatively insensitive to disorder or localization potentials in the active media. Hence, polaritons exhibit quantum coherence over macroscopic scales with high critical temperatures. Polaritons in quantum-well microcavities couple out of the cavity at a fixed rate while conserving the energy and in-plane wavenumber, providing direct experimental access that is unavailable in typical many-body quantum systems. Hallmarks of non-equilibrium condensation and superfluidity have been widely observed in isolated two-dimensional (2D) polariton systems (Ref. 3 and the references therein).Foundational work on 2D polariton systems has inspired theoretical schemes for polariton-based quantum circuits, 6-8 quantum light sources 9-12 and novel quantum phases. 4 Experimental implementation of these schemes requires the control, confinement and coupling of polariton systems, which remain challenging in conventional microcavity structures. Important features of a versatile experimental platform based on polaritons include: first, well-defined zero-dimensional (0D) polaritons as building blocks of a coupled system; second,

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Section: Introductionmentioning

confidence: 99%

Zero-dimensional polariton laser in a subwavelength grating-based vertical microcavity

et al. 2014

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“…By laterally confining light either by engineering the microcavity [11][12][13][14], or by the use of oval defects [15], it is possible to create a series of spatially distinct, confined polariton modes when these new cavity modes are strongly coupled to an exciton in a quantum well (QW). Therefore, taking advantage of the nonlinearity in the optical response of the polariton modes resulting from the exciton-exciton interactions, we can coherently excite this system to obtain the spatial multistability simply by changing the excitation power.…”

Section: Introductionmentioning

confidence: 99%

Spatial multistability induced by cross interactions of confined polariton modes

et al. 2016

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We demonstrate the occurrence of spatial multistability using laterally confined microcavity exciton-polaritons. By coherently exciting with a blue detuned laser a series of confined polariton modes, we investigate the effects of multistability on the transmitted laser beam as a function of the excitation power. At each threshold of the hysteresis loop, a switching of the mode profile of the laser beam is associated with a significant energy jump of each of the confined polariton modes in the mesa. A simulation of this behavior is achieved with a multimode generalization of the Gross-Pitaevskii equations in the exciton photon basis. The mechanism behind the spatial multistability is identified as a repulsive cross interaction between polaritons in different modes.

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“…These include Landau-Zener tunneling, population inversion, and self-trapping [3][4][5][6][7][8][9]. The realization of analogous effects for exciton-polariton condensates is important for optical communications technologies demanding ultrafast optical switches, long-range coherence, as well as picosecond quantum computing processes [10,11]. In this direction, advances in fabrication have led to successful demonstrations of Josephson oscillations as well as self-trapping in micropillar cavities [12,13].…”

Section: Introductionmentioning

confidence: 99%

Localization and self-trapping in driven-dissipative polariton condensates

Bello

Eastham

2017

Phys. Rev. B

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We study driven-dissipative Bose-Einstein condensates in a two-mode Josephson system, such as a double-well potential, with asymmetrical pumping. We investigate nonlinear effects on the condensate populations and mode transitions. The generalized Gross-Pitaevskii equations are modified in order to treat pumping of only a single mode. We characterize the steady-state solutions in such a system as well as criteria for potential trapping of a condensate mode. There are many possible steady states, with different density and/or phase profiles. Transitions between different condensate modes can be induced by varying the parameters of the junction or the initial conditions, or by applying external fields.

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Electroluminescence from spatially confined exciton polaritons in a textured microcavity

Cited by 16 publications

References 25 publications

Zero-dimensional polariton laser in a subwavelength grating-based vertical microcavity

Zero-dimensional polariton laser in a subwavelength grating-based vertical microcavity

Spatial multistability induced by cross interactions of confined polariton modes

Localization and self-trapping in driven-dissipative polariton condensates

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