Browsing by Author "Markina, Daria I."

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Open Access
Photoinduced transition from quasi-two-dimensional Ruddlesden-Popper to three-dimensional halide perovskites for the optical writing of multicolor and light-erasable images
(American Chemical Society, 2024-01-10) Anoshkin, Sergey S.; Shishkin, Ivan I.; Markina, Daria I.; Logunov, Lev S.; Demir, Hilmi Volkan; Rogach, Andrey L.; Pushkarev, Anatoly P.; (Makarov, Sergey V.
Optical data storage, information encryption, and security labeling technologies require materials that exhibit local, pronounced, and diverse modifications of their structure-dependent optical properties under external excitation. Herein, we propose and develop a novel platform relying on lead halide Ruddlesden-Popper phases that undergo a light-induced transition toward bulk perovskite and employ this phenomenon for the direct optical writing of multicolor patterns. This transition causes the weakening of quantum confinement and hence a reduction in the band gap. To extend the color gamut of photoluminescence, we use mixed-halide compositions that exhibit photoinduced halide segregation. The emission of the films can be tuned across the range of 450-600 nm. Laser irradiation provides high-resolution direct writing, whereas continuous-wave ultraviolet exposure is suitable for recording on larger scales. The luminescent images created on such films can be erased during the visualization process. This makes the proposed writing/erasing platform suitable for the manufacturing of optical data storage devices and light-erasable security labels.
Open Access
Polariton lasing in Mie-resonant perovskite nanocavity
(Editorial Office of Opto-Electronic Advances, 2024-01-19) Masharin, Mikhail A.; Khmelevskaia, Daria; Kondratiev, Valeriy I.; Markina, Daria I.; Utyushev, Anton D.; Dolgintsev, Dmitriy M.; Dmitriev, Alexey D.; Shahnazaryan, Vanik A.; Pushkarev, Anatoly P.; Işık, Furkan; Iorsh, Ivan V.; Shelykh, Ivan A.; Demir, Hilmi Volkan; Samusev, Anton K.; Makarov, Sergey V.
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 CsPbBr₃ nanoparticle to achieve coherent emission at the visible wavelength of around 0.53 μm from its ultra-small (≈0.007 μm³ or ≈λ³/20) 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 (≈35 meV), refractive index (>2.5 at low temperature), and luminescence quantum yield of CsPbBr₃, but also by the optimization of polaritons condensation on the Mie resonances with quality factors improved by the metallic substrate. Moreover, the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in CsPbBr₃, which govern polaritons condensation path. Such chemically synthesized colloidal CsPbBr₃ nanolasers can be potentially deposited on arbitrary surfaces, which makes them a versatile tool for integration with various on-chip systems.