Realization of an all optical exciton-polariton router

Marsault, Félix; Nguyen, Hai Son; Tanese, Dimitrii; Lemaı̂tre, A.; Galopin, Élisabeth; Sagnes, I.; Amo, A.; Bloch, J.

doi:10.1063/1.4936158

Cited by 95 publications

(72 citation statements)

References 43 publications

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“…These fascinating properties suggest not only a playground for studying physics of out of equilibrium Bose Einstein condensation, but also a potential platform for all-optical devices. In the later direction, many proof-of-concepts of polaritonic devices have been reported: polaritonic lasers [2], polariton transistors [3], resonant tunnelling diodes [4], interferometer [5], optical gates [3], and optical router [6]. Most of these demonstrations are in GaAs-based system the most accomplished technologies to engineer cavity polaritons.…”

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confidence: 99%

Room-Temperature Cavity Polaritons with 3D Hybrid Perovskite: Toward Large-Surface Polaritonic Devices

et al. 2019

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Hybrid halide perovskites are now considered as key materials for contemporary research in photovoltaics and nanophotonics. In particular, because these materials can be solution processed, they represent a great hope for obtaining low cost devices. While the potential of 2D layered hybrid perovskites for polaritonic devices operating at room temperature has been demonstrated in the past, the potential of the 3D perovskites has been much less explored for this particular application. Here, we report the strong exciton-photon coupling with 3D bromide hybrid perovskite. Cavity polaritons are experimentallly demonstrated from both reflectivity and photoluminescence experiments, at room temperature, in a 3λ/2 planar microcavity containing a large surface spin-coated CH 3 NH 3 PbBr 3 thin film. A microcavity quality factor of 92 was found and a large Rabi splitting of 70 meV was measured. This result paves the way to low-cost polaritonic devices operating at room temperature, potentially electrically injectable as 3D hybrid perovskites present good transport properties.Cavity polaritons are half-light half-matter quasiparticles arising from the strong coupling regime between excitonic and photonic modes [1]. Such regime is achieved when the coupling strength, related to the oscillator strength quantifying the light-matter interaction in a material, is larger than the dissipation rates of uncoupled excitons and cavity photons. Thanks to its hybrid nature, cavity polaritons inherit the best features of both the excitonic and photonic component: strongly nonlinear bosonic particles which can propagate balistically over macroscopic distance, and can be injected/probed via optical means. These fascinating properties suggest not only a playground for studying physics of out of equilibrium Bose Einstein condensation, but also a potential platform for all-optical devices. In the later direction, many proof-of-concepts of polaritonic devices have been reported: polaritonic lasers [2], polariton transistors [3], resonant tunnelling diodes [4], interferometer [5], optical gates [3], and optical router [6]. Most of these demonstrations are in GaAs-based system the most accomplished technologies to engineer cavity polaritons. However, due to the small excitonic effects and oscillator strength in GaAs, their operating regime is limited to cryogenic temperature. For this reason, materials presenting strong excitonic effects at room temperature, such as the high band gap materials GaN [7,8] or ZnO [9, 10] are actively studied. However, the achievement of inorganic semiconductor engineered confined microstructures need sophisticated and high * emmanuelle.deleporte@ens-cachan.fr temperature epitaxial techniques. Looking for low-cost solutions, soft chemistry and low temperature processed materials presenting strong excitonic effects were also considered. The strong coupling regime at room temperature has been demonstrated in planar microcavities containing organic materials [11][12][13][14] or organic-inorganic halide perovskites such ...

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Room-Temperature Cavity Polaritons with 3D Hybrid Perovskite: Toward Large-Surface Polaritonic Devices

et al. 2019

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“…Up to now, many studies have reported phenomena based on the physics of polaritons and their condensates such as superfluidity 11 , topological defects 12 , parametric amplification, 13 and their possible applications, such as low-threshold lasers 14,15 , optical switches and transistors [16][17][18] , diodes 19 , interferometers 20 , and optical routers 21,22 .…”

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Polariton condensation phase diagram in wide-band-gap planar microcavities: GaN versus ZnO

et al. 2016

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“…Semiconductor microcavities under incoherent background pumping, either electrical or optical, can be used in a variety of applications, such as optical routers [1,2], sources of terahertz radiation [3,4], highspeed optical polarization switches [5,6]. In this context, electricaly pumped microcavities have applicationoriented perspective, for obvious reasons.…”

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“…(1), (2), and (4) represent a closed consistent system of equations and fully describe the electronhole dynamics with proper boundary conditions. In particular, if we want to simulate the voltage-controlled heterostructure, then for the z = 0 (n-electrode of the heterostructure) we have N + D − N − A + p − n = 0, in the mean time, the bias, U (applied voltage), comes into the equations as…”

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Operation of a semiconductor microcavity under electric excitation

Karpov

Savenko

2016

Applied Physics Letters

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We present a microscopic theory for the description of the bias-controlled operation of an excitonpolariton-based heterostructure, in particular, the polariton laser. Combining together the Poisson equations for the scalar electric potential and Fermi quasi-energies of electrons and holes in a semiconductor heterostructure, the Boltzmann equation for the incoherent excitonic reservoir and the Gross-Pitaevskii equation for the exciton-polariton mean field, we simulate the dynamics of the system minimising the number of free parameters and build a theoretical threshold characteristics: number of particles vs applied bias. This approach, which also accounts for the nonlinear (exciton-exciton) interaction, particle lifetime, and which can, in principle, account for any relaxation mechanisms for the carriers of charge inside the heterostructure or polariton loss, allows to completely describe modern experiments on polariton transport and model devices.

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Realization of an all optical exciton-polariton router

Cited by 95 publications

References 43 publications

Room-Temperature Cavity Polaritons with 3D Hybrid Perovskite: Toward Large-Surface Polaritonic Devices

Room-Temperature Cavity Polaritons with 3D Hybrid Perovskite: Toward Large-Surface Polaritonic Devices

Polariton condensation phase diagram in wide-band-gap planar microcavities: GaN versus ZnO

Operation of a semiconductor microcavity under electric excitation

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