Strong coupling between distant photonic nanocavities and its dynamic control
Strong coupling between distant photonic nanocavities and its dynamic control
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DOI：
10.1038/nphoton.2011.286
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发表时间：
2012-01-01
期刊：
影响因子：
35
通讯作者：
Noda, Susumu
中科院分区：
文献类型：
--
作者：
Sato, Yoshiya;Tanaka, Yoshinori;Noda, Susumu
片上任意位置的光子纳米结构之间的耦合状态的形成及其动态控制对于实现具有更高功能的下一代光子电路具有重要意义，如光的停止/减速和量子信息处理。在这里，我们证明了对于遥远的超高Q光子纳米空间，可以实现强耦合及其动态控制。我们使用一对Q因子超过400,000的纳米腔，通过具有修改的态密度的波导间接连接。令人惊讶的是，即使纳米腔之间的距离超过100个波长，我们仍然清楚地观察到拉比振荡，表明它们之间存在强烈的耦合。这种振荡以54ps的周期在纳米腔之间交换光子，同时将它们集中在纳米腔中，而不是在波导中。此外，通过动态控制任一纳米腔的属性，可以按需停止这种光子交换，冻结光子状态。
The formation of a coupled state among on-chip, photonic nanostructures at arbitrary positions as well as its dynamic control are important in the realization of next-generation photonic circuits with elevated functionality such as stopping/slowing of light and quantum information processing. Here, we demonstrate that strong coupling and its dynamic control can be realized for distant, ultrahigh-Q photonic nanocavities. We use a pair of nanocavities with Q-factors exceeding 400,000, connected indirectly by a waveguide with a modified density of states. Surprisingly, even though the distance between the nanocavities exceeds 100 wavelengths, we clearly observe Rabi oscillation, indicating their strong coupling. This oscillation exchanges photons between the nanocavities with a period of 54 ps while concentrating them in the nanocavities, not in the waveguide. In addition, by dynamically controlling the properties of either nanocavity, this exchange of photons can be stopped on demand, freezing the photon state.