囚禁极化激元凝聚体中的拓扑电荷切换
Topological charge switching in trapped polariton condensates
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中文总结 AI 辅助
该研究在囚禁于光子晶体连续域束缚态的极化激元凝聚体中，通过调节激发功率利用极化激元蓝移实现拓扑电荷切换，为光学控制拓扑电荷提供了新平台。
中文摘要 AI 辅助
光子系统中的拓扑电荷提供了一种鲁棒的自由度，可直接应用于光信息处理。光子晶体平板中的连续域束缚态（BIC）固有地携带这种量子化拓扑电荷，但它们受拓扑保护，使得主动重构极具挑战性。在此，我们演示了光子晶体中囚禁的BIC极化激元凝聚体的拓扑电荷切换，其中光子晶体的空间调制支持多个受限态，每个态携带不同的电荷。狄拉克带隙内的囚禁凝聚体通过极化激元蓝移被逐出到泄漏带，仅通过调节激发功率即可实现单模选择。本工作提供了一种利用极化激元非线性来光学控制拓扑电荷的平台。
英文摘要
Topological charges in photonic systems provide a robust degree of freedom with direct applications in optical information processing. Bound states in the continuum (BICs) in photonic crystal slabs inherently carry such quantized topological charges, yet they are topologically protected, making active reconfiguration fundamentally challenging. Here, we demonstrate topological charge switching in trapped BIC polariton condensates in a photonic crystal, where spatial modulation of the photonic crystals supports multiple confined states, each carrying a distinct charge. Trapped condensates within the Dirac bandgap are expelled into the leaky band via polariton blueshift, enabling single-mode selection by solely tuning the excitation power. This work offers a platform for optically controlling topological charges by harnessing polariton nonlinearity.
发表机构
- Korea Advanced Institute of Science and Technology (KAIST)（韩国科学技术院）
- Korea Institute of Science and Technology (KIST)（韩国科学技术研究院）
- Gachon University（伽倻大学）
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