Polariton lasing in Mie-resonant perovskite nanocavity

Abstract

Deeply subwavelength lasers (or nanolasers) are highly demanded for compact on-chip bioimaging and sensing at the nanoscale. One of the main obstacles for the development of single-particle nanolasers with all three dimensions shorter than the emitting wavelength in the visible range is the high lasing thresholds and the resulting overheating. Here we exploit exciton-polariton condensation and mirror-image Mie modes in a cuboid CsPbBr${}_3$ nanoparticle to achieve coherent emission at the visible wavelength of around 0.53~$\mu$m from its ultra-small ($\approx$0.007$\mu$m${}^3$ or $\approx {\lambda }^3$/20) semiconductor nanocavity. The polaritonic nature of the emission from the nanocavity localized in all three dimensions is proven by direct comparison with corresponding one-dimensional and two-dimensional waveguiding systems with similar material parameters. Such a deeply subwavelength nanolaser is enabled not only by the high values for exciton binding energy ($\approx$35 meV), refractive index ($>$2.5 at low temperature), and luminescence quantum yield of CsPbBr${}_3$, but also by the optimization of polaritons condensation on the Mie resonances. Moreover, the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in CsPbBr${}_3$, which govern polaritons condensation path. Such chemically synthesized colloidal CsPbBr${}_3$ nanolasers can be easily deposited on arbitrary surfaces, which makes them a versatile tool for integration with various on-chip systems.

29 pages, 19 Figures

References in corpus (8)

• Exciton-polariton condensates
• Polariton laser using single micropillar GaAs-GaAlAs semiconductor cavities
• Polariton Condensate Transistor Switch
• Bound state in the continuum in slab waveguide enables low-threshold quantum-dot lasing
• Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature
• Giant and tunable excitonic optical anisotropy in single-crystal CsPbX${}_3$ halide perovskites
• Polaron-enhanced polariton nonlinearity in lead halide perovskites
• Brightening of a dark monolayer semiconductor via strong light-matter coupling in a cavity

Cited by in corpus (1)

• Quasinormal mode as a foundational framework for all electromagnetic Fano resonances