Condensation dynamics in a two-dimensional photonic crystal waveguide
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866913594591936512 |
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| author | Efthymiou-Tsironi, Maria Gianfrate, Antonio Trypogeorgos, Dimitrios Leblanc, Charly Riminucci, Fabrizio Salerno, Grazia De Giorgi, Milena Ballarini, Dario Sanvitto, Daniele |
| author_facet | Efthymiou-Tsironi, Maria Gianfrate, Antonio Trypogeorgos, Dimitrios Leblanc, Charly Riminucci, Fabrizio Salerno, Grazia De Giorgi, Milena Ballarini, Dario Sanvitto, Daniele |
| contents | Exciton-polariton condensation occurs at the extrema of the underlying dispersion where the density of states diverges and carriers can naturally accumulate. The existence of multiple such points leads to coupling and competition between the associated modes and dynamical redistribution of the carriers in the dispersion. Here, we directly engineer the above situation via subwavelength periodic patterning of a two-dimensional nanostructure. This leads to multimode condensation into a pair of symmetric condensates that form at high-momenta, accidental-coupling points, and a high-symmetry $Γ$-point with a bound-in-the-continuum (BiC) state. The dynamical behaviour of the system reveals the non-simultaneous appearance of these condensates and the interplay of non-trivial gain and relaxation mechanisms. We fully characterise the quasi-static and dynamical regime of this artificial crystal and the properties of the different condensates. This understanding is necessary when band-structure engineering techniques are used to achieve precise control of condensate formation with given energy and momentum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_01684 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Condensation dynamics in a two-dimensional photonic crystal waveguide Efthymiou-Tsironi, Maria Gianfrate, Antonio Trypogeorgos, Dimitrios Leblanc, Charly Riminucci, Fabrizio Salerno, Grazia De Giorgi, Milena Ballarini, Dario Sanvitto, Daniele Optics Quantum Gases Exciton-polariton condensation occurs at the extrema of the underlying dispersion where the density of states diverges and carriers can naturally accumulate. The existence of multiple such points leads to coupling and competition between the associated modes and dynamical redistribution of the carriers in the dispersion. Here, we directly engineer the above situation via subwavelength periodic patterning of a two-dimensional nanostructure. This leads to multimode condensation into a pair of symmetric condensates that form at high-momenta, accidental-coupling points, and a high-symmetry $Γ$-point with a bound-in-the-continuum (BiC) state. The dynamical behaviour of the system reveals the non-simultaneous appearance of these condensates and the interplay of non-trivial gain and relaxation mechanisms. We fully characterise the quasi-static and dynamical regime of this artificial crystal and the properties of the different condensates. This understanding is necessary when band-structure engineering techniques are used to achieve precise control of condensate formation with given energy and momentum. |
| title | Condensation dynamics in a two-dimensional photonic crystal waveguide |
| topic | Optics Quantum Gases |
| url | https://arxiv.org/abs/2412.01684 |