High-speed flow of interacting organic polaritons

Lerario, Giovanni; Ballarini, Dario; Fieramosca, Antonio; Cannavale, Alessandro; Genco, Armando; Mangione, Federica; Gambino, Salvatore; Dominici, Lorenzo; Giorgi, Milena De; Gigli, Giuseppe; Sanvitto, D.

doi:10.1038/lsa.2016.212

Cited by 111 publications

(119 citation statements)

References 57 publications

Supporting

Mentioning

112

Contrasting

Order By: Relevance

“…Organic microcavities owing to their very robust excitons 14 are much more resilient and have been shown to support room temperature operation 15–17 . Furthermore, recent studies highlight their superfluid properties and long range propagation with potential use in interferometric devices 18, 19 .…”

Section: Introductionmentioning

confidence: 99%

Hybrid organic-inorganic polariton laser

Paschos

Somaschi

Tsintzos

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Organic materials exhibit exceptional room temperature light emitting characteristics and enormous exciton oscillator strength, however, their low charge carrier mobility prevent their use in high-performance applications such as electrically pumped lasers. In this context, ultralow threshold polariton lasers, whose operation relies on Bose-Einstein condensation of polaritons – part-light part-matter quasiparticles, are highly advantageous since the requirement for high carrier injection no longer holds. Polariton lasers have been successfully implemented using inorganic materials owing to their excellent electrical properties, however, in most cases their relatively small exciton binding energies limit their operation temperature. It has been suggested that combining organic and inorganic semiconductors in a hybrid microcavity, exploiting resonant interactions between these materials would permit to dramatically enhance optical nonlinearities and operation temperature. Here, we obtain cavity mediated hybridization of GaAs and J-aggregate excitons in the strong coupling regime under electrical injection of carriers as well as polariton lasing up to 200 K under non-resonant optical pumping. Our demonstration paves the way towards realization of hybrid organic-inorganic microcavities which utilise the organic component for sustaining high temperature polariton condensation and efficient electrical injection through inorganic structure.

show abstract

Section: Introductionmentioning

confidence: 99%

Hybrid organic-inorganic polariton laser

Paschos

Somaschi

Tsintzos

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…1c of Ref. 41 ). Photoluminescence (PL) is excited through a 10X objective (Rolyn-Rau, N.A.=0.3) and the PL signal is collected by A 60X oil immersion microscope objective (Olympus, N.A.=1.49).…”

Section: Discussionmentioning

confidence: 87%

Tunable Out-of-Plane Excitons in 2D Single-Crystal Perovskites

et al. 2018

Self Cite

View full text Add to dashboard Cite

Hybrid organic-inorganic perovskites have emerged as very promising materials for photonic applications, thanks to the great synthetic versatility that allows to tune their optical properties. In the two-dimensional (2D) crystalline form, these materials behave as multiple quantum-well heterostructures with stable excitonic resonances up to room temperature. In this work strong lightmatter coupling in 2D perovskite single-crystal flakes is observed, and the polarization-dependent exciton-polariton response is used to disclose new excitonic features. For the first time, an outof-plane component of the excitons is observed, unexpected for such 2D systems and completely absent in other layered materials, such as transition-metal dichalcogenides. By comparing different hybrid perovskites with the same inorganic layer but different organic interlayers, it is shown how the nature of the organic ligands controllably affects the out-of-plane exciton-photon coupling. Such vertical dipole coupling is particularly sought in those systems, e.g. plasmonic nanocavities, in which the direction of the field is usually orthogonal to the material sheet. Organic interlayers are shown to affect also the strong birefringence associated to the layered structure, which is exploited in this work to completely rotate the linear polarization degree in only few microns of propagation, akin to what happens in metamaterials.

show abstract

“…Alternative 2D plaforms are represented by, e.g., multilayer stacks supporting Bloch surface waves (BSWs) at the external interface. These surface modes natu-rally exhibit very large in-plane speed-which converts into long range propagation-with negative mass dispersion and have shown exploitable nonlinearity upon coupling with an organic layer, stable up to room temperature 54 . BSW are growing competitive systems compared to surface plasmon resonance for label-free high sensitivity biosensing.…”

Section: Discussionmentioning

confidence: 99%

Superluminal X-waves in a polariton quantum fluid

et al. 2017

Self Cite

View full text Add to dashboard Cite

In this work, we experimentally demonstrate for the first time the spontaneous generation of two-dimensional exciton-polariton X-waves. X-waves belong to the family of localized packets that can sustain their shape without spreading, even in the linear regime. This allows the wavepacket to maintain its shape and size for very low densities and very long times compared to soliton waves, which always necessitate a nonlinearity to compensate the diffusion. Here, we exploit the polariton nonlinearity and uniquely structured dispersion, comprising both positive- and negative-mass curvatures, to trigger an asymmetric four-wave mixing in momentum space. This ultimately enables the self-formation of a spatial X-wave front. Using ultrafast imaging experiments, we observe the early reshaping of the initial Gaussian packet into the X-pulse and its propagation, even for vanishingly small densities. This allows us to outline the crucial effects and parameters that drive the phenomena and to tune the degree of superluminal propagation, which we found to be in close agreement with numerical simulations.

show abstract

High-speed flow of interacting organic polaritons

Cited by 111 publications

References 57 publications

Hybrid organic-inorganic polariton laser

Hybrid organic-inorganic polariton laser

Tunable Out-of-Plane Excitons in 2D Single-Crystal Perovskites

Superluminal X-waves in a polariton quantum fluid

Contact Info

Product

Resources

About