Institute of Physics, Ernst-Moritz-Arndt University Greifswald, Greifswald, 17489, Germany.
Sci Rep. 2017 Aug 29;7(1):9811. doi: 10.1038/s41598-017-09942-3.
Analyzing the scattering and conversion process between photons and phonons coupled via radiation pressure in a circular quantum dot on a honeycomb array of optomechanical cells, we demonstrate the emergence of optomechanical Dirac physics. Specifically we prove the formation of polaritonic quasi-bound states inside the dot, and angle-dependent Klein tunneling of light and emission of sound, depending on the energy of the incident photon, the photon-phonon interaction strength, and the radius of the dot. We furthermore demonstrate that forward scattering of light or sound can almost switched off by an optically tuned Fano resonance; thereby the system may act as an optomechanical translator in a future photon-phonon based circuitry.
分析在蜂窝状的光机械单元阵列上的圆形量子点中通过辐射压力耦合的光子和声子的散射和转换过程，我们展示出了光机械狄拉克物理的出现。具体来说，我们证明了在点内形成了极化激元准束缚态，以及取决于入射光子能量、光子-声子相互作用强度和点的半径的光的角度相关的克莱因隧道和声音的发射。我们进一步证明，光或声音的前向散射可以通过光调谐的 Fano 共振几乎完全关闭；因此，该系统在未来基于光子-声子的电路中可以作为光机械转换器。
