A low threshold nanocavity in a two-dimensional 12-fold photonic quasicrystal

作者：Ren, Jie; Sun, XiaoHong^*; Wang, Shuai

来源：Optics and Laser Technology, 2018, 101: 42-48.

DOI：10.1016/j.optlastec.2017.10.031

• Nanocavity
• 12-fold photonic quasicrystal
• High-Q
• Mode volume
• Low threshold

In this article, a low threshold nanocavity is built and investigated in a two-dimensional 12-fold holographic photonic quasicrystal (PQC). The cavity is formed by using the method of multi-beam common-path interference. By finely adjusting the structure parameters of the cavity, the Q factor and the mode volume are optimized, which arc two keys to low-threshold on the basis of Purcell effect. Finally, an optimal cavity is obtained with Q value of 6023 and mode volume of 1.24 x 10(-12) cm(3). On the other hand, by Fourier Transformation of the electric field components in the cavity, the in-plane wave vectors are calculated and fitted to evaluate the cavity performance. The performance analysis of the cavity further proves the effectiveness of the optimization process. This has a guiding significance for the research of low threshold nano-laser.

• 出版日期2018-5
• 单位郑州大学