Reliefs of the Determinant in the Threshold Condition Analysis of a Micro/Nano Laser on a Single Graphene Strip in a Circular Quantum Wire

The reliefs of the determinant, i.e., the absolute values of the determinant as a function of frequency and threshold material gain, are analyzed. The considered geometry includes a symmetrically placed single graphene strip in a circular quantum wire. The directory names correspond to the geometric parameters (in micrometers), while the file name represents the chemical potential of the graphene strip (in electron volts). The frequency values are given in THz. The real part of the permittivity of the wire material is 2.25, corresponding to a refractive index of 1.5.本文针对行列式的分布特性展开分析，具体为以频率与阈值材料增益为自变量的行列式绝对值。所考量的几何结构为：在圆形量子线中对称布设单条石墨烯带。数据集的文件夹名称对应几何参数（单位：微米），而文件名则表征石墨烯带的化学势（单位：电子伏特）。频率单位采用太赫兹（THz）。该量子线材料的介电常数实部为2.25，对应折射率为1.5。