论文标题
基于电气控制的圆形布拉格光栅中量子点的光纤量子量子光源的高性能设计
High-performance designs for fiber-pigtailed quantum-light sources based on quantum dots in electrically-controlled circular Bragg gratings
论文作者
论文摘要
我们介绍了直接纤维耦合的混合圆形布拉格格栅（CBG）的数值研究，该圆形圆形光栅（CBGS）具有用于在930 nm左右的相关波长和电信O-和C波段的应用相关波长中的电气控制。我们使用与贝叶斯优化方法相结合的替代模型对设备性能进行数值优化，该功能对制造公差进行了鲁棒性。提出的高性能设计将HCBG与介电平面化和透明接触材料相结合，使> 86％的直接纤维耦合效率（最高> 93％的效率为Na 0.8），而表现出percell因子> 20。尤其是电信范围的建议设计证明是强大的，并且可以维持预期的纤维效率超过$（82.2 \ pm4.1）^{+2.2} _ { - 5.5} $％和预期的平均purcell因子，其平均purcell因子（23.2 \ pm2.3）^{+3.2}^{+3.2} _ {+3.2} _ {-3.0 _ {-3.0} $ contrication。最大purcell增强的波长被证明是偏差受影响最大的性能参数。最后，我们表明，可以在已确定的设计中达到适合于嵌入式量子点进行纯正调整的电场强度。
We present a numerical investigation of directly fiber-coupled hybrid circular Bragg gratings (CBGs) featuring electrical control for operation in the application relevant wavelength regimes around 930 nm as well as the telecom O- and C-band. We use a surrogate model combined with a Bayesian optimization approach to perform numerical optimization of the device performance which takes into account robustness with respect to fabrication tolerances. The proposed high-performance designs combine hCBGs with a dielectric planarization and a transparent contact material, enabling >86% direct fiber coupling efficiency (up to >93% efficiency into NA 0.8) while exhibiting Purcell Factors >20. Especially the proposed designs for the telecom range prove robust and can sustain expected fiber efficiencies of more than $(82.2\pm4.1)^{+2.2}_{-5.5}$% and expected average Purcell Factors of up to $(23.2\pm2.3)^{+3.2}_{-3.0}$ assuming conservative fabrication accuracies. The wavelength of maximum Purcell enhancement proves to be the most affected performance parameter by the deviations. Finally, we show that electrical field strengths suitable for Stark-tuning of an embedded quantum dot can be reached in the identified designs.
