Room-temperature polariton repulsion and ultra-strong coupling for a non-trivial topological one-dimensional tunable Fibonacci-conjugated porous-Silicon photonic quasi-crystal showing quasi bound-states-in-the-continuum
| Autor: | Pérez, Atzin David Ruiz, Guerrero, Salvador Escobar, Lara, Ma. Del Rocío Nava, Reyes-Esqueda, Jorge-Alejandro |
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| Rok vydání: | 2023 |
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| Druh dokumentu: | Working Paper |
| Popis: | Room temperature strong coupling from CdSeS/Zn quantum-dots embedded into a tunable porous-silicon Fibonacci-conjugated array could be observed when exciton's energy was tuned either to the photonic-edge or the defect in the middle of the pseudo-bandgap region of the 1D cavity. Both, the photonic-edge and the defect could be identified as topological edge modes and quasi-bound-states-in-the-continuum, where large density of states and field localization over a wider bandwidth produce a broadband Purcell enhancement, helping to optimize the coupling among the exciton and the 1D photonic quasi-crystal despite the natural difficulty to make the quantum dots to penetrate the cavity pores. A clear repulsion among polaritons, amounting to almost 8 meV for in-plane k values when the cavity energy is larger than the exciton one (blue k-detuning), was measured when increasing the incident light fluence, marking the potential of this non-trivial topological array for achieving polariton quantum blockade. Evidence for ultra-strong coupling, where a shift as large as 20 meV, could be found when the defect of the pseudo-bandgap region of the cavity was tuned to the exciton. Comment: Atzin David Ruiz P\'erez, and Salvador Escobar Guerrero contributed equally to the paper |
| Databáze: | arXiv |
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