毫开尔文温度下强耦合超压缩自腔等离激元极化激元
Strongly coupled ultracompressed self-cavity plasmon polaritons at millikelvin temperatures
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- Cornell University（康奈尔大学）
- Kavli Institute for Nanoscience at Cornell（康奈尔纳米科学卡弗里研究所）
- Max Planck Institute for Structure and Dynamics（马克斯·普朗克结构与动力学研究所）
- National Institute for Materials Science（日本国立材料研究所）
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中文总结 AI 辅助
本文提出基于超导层自腔与石墨烯集成的平台，在毫开尔文温度下实现亚太赫兹欠阻尼等离激元极化激元，并利用超导电路光谱仪进行探测，为腔-物质混合系统研究开辟新途径。
中文摘要 AI 辅助
范德华异质结构在亚太赫兹至太赫兹频率范围内表现出自腔共振，因此为实现腔修饰的物质相提供了一条有吸引力的途径。对此类系统的光谱研究要求在毫开尔文温度下具有高频率分辨率，而现有方法极难满足这一要求。在此，我们展示了一种用于实现和探测此类系统的新平台。超导层定义了自腔结构，其电磁体积压缩量级约为$10^7$。通过集成石墨烯层，我们观察到频率低至0.04太赫兹的欠阻尼腔等离激元极化激元，并且这些极化激元与腔模表现出避免交叉现象。为测量此类光谱，我们部署了一种基于超导电路的、兼容毫开尔文温度的亚太赫兹光谱仪。这项工作为在毫开尔文温度下对腔-物质混合系统进行同步光谱和输运测量铺平了道路。
英文摘要
Van der Waals heterostructures exhibit self-cavity resonances from sub-terahertz to terahertz frequencies and thus offer an attractive route toward realizing cavity-modified phases of matter. Spectroscopy of such systems calls for high frequency resolution at millikelvin temperatures, which is extremely challenging with existing methods. Here we demonstrate a new platform for realizing and probing such systems. Superconducting layers define self-cavity structures with electromagnetic volume compression of order $10^7$. With an integrated graphene layer, we observe underdamped cavity plasmon polaritons at frequencies as low as 0.04 THz and which exhibit avoided crossings with cavity modes. To measure such spectra, we deploy a millikelvin-compatible sub-THz spectrometer based on a superconducting circuit. This work paves the way for simultaneous spectroscopy and transport measurements of cavity-matter hybrid systems at millikelvin temperatures.
