Observation of Two Thresholds Leading to Polariton Condensation in 2D Hybrid Perovskites
| Autor: | Giuseppe Gigli, Antonio Fieramosca, Vincenzo Maiorano, Marco Pugliese, Giovanni Lerario, Daniele Sanvitto, Luisa De Marco, Marco Cinquino, Dario Ballarini, Francesco Todisco, Carmela Tania Prontera, Laura Polimeno, Vincenzo Ardizzone, Milena De Giorgi, Lorenzo Dominici |
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| Přispěvatelé: | Polimeno, L., Fieramosca, A., Lerario, G., Cinquino, M., De Giorgi, M., Ballarini, D., Todisco, F., Dominici, L., Ardizzone, V., Pugliese, M., Prontera, C. T., Maiorano, V., Gigli, G., De Marco, L., Sanvitto, D. |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Phase transition
Materials science Oscillator strength Physics::Optics FOS: Physical sciences 02 engineering and technology 010402 general chemistry 01 natural sciences Laser linewidth Condensed Matter::Materials Science Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Polariton 2D perovskite Perovskite (structure) Condensed Matter::Quantum Gases lasing Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics business.industry Condensed Matter::Other 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials condensation Coherent states Photonics 0210 nano-technology business Lasing threshold Physics - Optics Optics (physics.optics) polaritons |
| Popis: | Two dimensional (2D) perovskites are promising materials for photonic applications, given their outstanding nonlinear optical properties, ease of fabrication and versatility. In particular, exploiting their high oscillator strength, the crystalline form of 2D perovskites can be used as excitonic medium in optical microcavities, allowing for the study of their optical properties in the strong light-matter coupling regime. While polariton condensation has been observed in different materials at room temperature, here we observe for the first time two distinct threshold processes in a 2D perovskite, a material that has never shown spontaneous phase transition up to now. In particular, we demonstrate lasing from the bi-exciton state which contributes to populate the lower polariton branch and, at higher excitation powers, eventually leads to the formation of a polariton condensate. The emission linewidth narrowing and a spatial coherence over 50 x 50 um2 area are the smoking gun, the formation of a quantum coherent state in 2D hybrid perovskite. Our results not only show the formation of a polariton condensate in 2D perovskites but they are also crucial for the understanding of the physical mechanisms that leads to coherent phase transition in perovskite-based polariton microcavities. |
| Databáze: | OpenAIRE |
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