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- W3214751231 abstract "The antimony-based chalcogenide Sb2Se3 is a rapidly emerging material for photonic phase change applications owing to its ultra-low optical losses at telecommunication wavelengths in both crystalline and amorphous phases. Here, we investigate the dynamical response of these materials from nanoseconds to milliseconds under optical pumping conditions. We apply bichromatic pump-probe transient reflectance spectroscopy which is a widely used method to study the optical performance of optical phase change materials. Amorphous regions of several hundreds of nanometers in diameter are induced by pulsed excitation of the material using a wavelength of 488 nm above the absorption edge, while the transient reflectance is probed using a continuous wave 980 nm laser, well below the absorption edge of the material. We find vitrification dynamics in the nanosecond range and observe crystallization on millisecond time scales. These results show a large five-orders of magnitude difference in time scales between crystallization and vitrification dynamics in this material. The insights provided in this work are fundamental for the optimisation of the material family and its employment in photonic applications." @default.
- W3214751231 created "2021-12-06" @default.
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- W3214751231 date "2022-05-10" @default.
- W3214751231 modified "2023-10-13" @default.
- W3214751231 title "Time-resolved reversible optical switching of the ultralow-loss phase change material Sb<sub>2</sub>Se<sub>3</sub>" @default.
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- W3214751231 doi "https://doi.org/10.1088/2040-8986/ac5ece" @default.
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