论文标题
在量子元面中操纵广义的狄拉克锥
Manipulating Generalized Dirac Cones In Quantum Metasurfaces
论文作者
论文摘要
我们讨论了量子跨面的亚基集体模式中广义狄拉克锥的出现和操纵。我们考虑了在蜂窝晶格中排列的单个量子发射器的集合，并具有下波长的周期性。虽然常规的蜂窝量子元面积寄主模式在K和K点显示狄拉克锥，但我们表明，在晶格中引入单轴各向异性会导致变化的分散关系。其中包括倾斜圆锥的倾斜，将狄拉克点状态的局部密度从消失（I型）变为分化（II型和III型），半迪拉克点的出现，正交指示中的线性和二次纠纷以及远离dirac锥的各向异性运动的线性和二次纠纷。这样的能量分散体可以大大改变局部探针的动力学，例如量子发射器，它们已被证明会诱导各向异性，幂律相互作用
We discuss the emergence and manipulation of generalised Dirac cones in the subradiant collective modes of quantum metasurfaces. We consider a collection of single quantum emitters arranged in a honeycomb lattice with subwavelength periodicity. While conventional honeycomb quantum metasurfaces host bound modes that display Dirac cones at the K and K' points, we show that introducing uniaxial anisotropy in the lattice results in modified dispersion relations. These include the tilting of Dirac cones, which changes the local density of states at the Dirac point from vanishing (type I) to diverging (types II and III), the emergence of semi-Dirac points, with linear and quadratic dispersions in orthogonal directions, and the anisotropic movement of Dirac cones away from the K and K' points. Such energy dispersions can modify substantially the dynamics of local probes, such as quantum emitters, to which they have been shown to induce anisotropic, power-law interactions
