论文标题
光谱奇异性和可调板激光器带有2D材料涂层
Spectral singularities and tunable slab lasers with 2D material coating
论文作者
论文摘要
我们研究了平板激光器的横向电气和横向磁模式中的线性和非线性光谱奇异性，该板激光器由夹在一对石墨烯或Weyl Semimital薄片之间的活性平面板组成。线性光谱奇点的存在的要求提供了激光阈值条件，而由于诱发的弱Kerr非线性引起的非线性光谱奇异性的存在允许计算阈值附近的激光输出强度。石墨烯和Weyl半分片的存在引入了其他物理参数，我们可以用来调整激光的输出强度。我们对这种现象提供了一项全面的研究，并报告了用Weyl Semimetal涂层在平板的TM模式下进行激光的特殊性。特别是，我们揭示了临界角的存在，因此，对于具有较小发射角的平板的TM模式似乎不可能进行激光。我们的结果表明，对于发射角度的TM模式略微超过临界角度，激光输出强度对涂层的物理参数高度敏感。
We investigate linear and nonlinear spectral singularities in the transverse electric and transverse magnetic modes of a slab laser consisting of an active planar slab sandwiched between a pair of Graphene or Weyl semimetal thin sheets. The requirement of the presence of linear spectral singularities gives the laser threshold condition while the existence of nonlinear spectral singularities due to an induced weak Kerr nonlinearity allows for computing the laser output intensity in the vicinity of the threshold. The presence of the Graphene and Weyl semimetal sheets introduces additional physical parameters that we can use to tune the output intensity of the laser. We provide a comprehensive study of this phenomenon and report peculiarities of lasing in the TM modes of the slab with Weyl semimetal coatings. In particular, we reveal the existence of a critical angle such that no lasing seems possible for TM modes of the slab with smaller emission angle. Our results suggest that for TM modes with emission angle slightly exceeding the critical angle, the laser output intensity becomes highly sensitive to the physical parameters of the coating.
