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Recently, a research team helmed by Professor Xiao Yunfeng and Associate Researcher Cao Qitao from Peking University's School of Physics has, for the first time, experimentally elucidated the critical dynamics underlying state transitions in an optical microcavity laser system boasting an ultra-high-quality factor. Their study revealed that when external control parameters traverse the critical point at varying speeds, the duration needed for the laser to switch between nearly-degenerate standing-wave supermodes adheres to a universal square-root power-law scaling relationship. This breakthrough not only establishes a temporal benchmark for the high-speed, reconfigurable control of microcavity lasers but also furnishes empirical evidence crucial for investigating critical dynamics in non-equilibrium, driven-dissipative photonic systems.
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