Kwak Hojeong, Shin Younghoon, Moon Songky, Lee Sang-Bum, Yang Juhee, An Kyungwon
School of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea.
Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.
Sci Rep. 2015 Mar 11;5:9010. doi: 10.1038/srep09010.
Noncircular two-dimensional microcavities support directional output and strong confinement of light, making them suitable for various photonics applications. It is now of primary interest to control the interactions among the cavity modes since novel functionality and enhanced light-matter coupling can be realized through intermode interactions. However, the interaction Hamiltonian induced by cavity deformation is basically unknown, limiting practical utilization of intermode interactions. Here we present the first experimental observation of resonance-assisted tunneling in a deformed two-dimensional microcavity. It is this tunneling mechanism that induces strong inter-mode interactions in mixed phase space as their strength can be directly obtained from a separatrix area in the phase space of intracavity ray dynamics. A selection rule for strong interactions is also found in terms of angular quantum numbers. Our findings, applicable to other physical systems in mixed phase space, make the interaction control more accessible.
非圆形二维微腔支持光的定向输出和强限制，使其适用于各种光子学应用。由于可以通过模间相互作用实现新颖的功能和增强的光与物质的耦合，因此控制腔模之间的相互作用目前成为主要研究兴趣。然而，由腔变形引起的相互作用哈密顿量基本上是未知的，这限制了模间相互作用的实际应用。在此，我们展示了在变形二维微腔中对共振辅助隧穿的首次实验观测。正是这种隧穿机制在混合相空间中诱导了强模间相互作用，因为它们的强度可以直接从腔内光线动力学相空间中的分界线面积获得。还根据角量子数发现了强相互作用的选择规则。我们的发现适用于混合相空间中的其他物理系统，使相互作用控制更容易实现。
