论文标题
混合VO2/SI波导中全光开关的时间动力学
Temporal dynamics of all-optical switching in hybrid VO2/Si waveguides
论文作者
论文摘要
二氧化钒（VO2）是开发混合光子综合设备（图片）的最有希望的材料之一。然而，尽管已经报道了几次飞秒的切换时间，但使用平面光学信号嵌入波导中的VO2的全关光时间动力学仍然隐藏。在这里，我们通过在电信波长下使用泵探针测量值在杂种VO2/SI波导中进行实验研究。我们的结果表明，微型和纳秒范围内的切换时间，表明该相变是从VO2吸收的光中触发的，并且时间响应受热导电动力学的控制。通过适当地设计光脉冲，我们可以通过几种纳米joules的能量消耗纳米秒的前景切换时间。我们的结果揭示了一种新的时间动态，该动态对于开发未来的全光子VO2光子集成设备有用。
Vanadium dioxide (VO2) is one of the most promising materials for developing hybrid photonic integrated devices (PICs). However, despite switching times as low as a few femtoseconds have been reported, the all-optical temporal dynamics of VO2 embedded in a waveguide using an in-plane optical signal remain still hidden. Here, we experimentally investigate this behavior in hybrid VO2/Si waveguides by using pump-probe measurements at telecom wavelengths. Our results show switching times in the micro and nanosecond range, suggesting that the phase transition is triggered thermally from the light absorbed by the VO2 and the temporal response is governed by thermal conductive dynamics. By properly engineering the optical pulse, we prospect switching times of nanoseconds with an energy consumption of a few nanojoules. Our results unveil a new temporal dynamic that would be useful for developing future all-optical VO2 photonic integrated devices.
