Application of 2D graded eye-shape scatterers for slow light effect in photonic crystal line defect waveguide

作者：Wan, Yong^*; Ge, Shengbo; Guo, Yue; Yun, Maojin

来源：Optik, 2014, 125(5): 1605-1609.

DOI：10.1016/j.ijleo.2013.10.015

• Eye-shape
• Scatterers
• Graded
• Slow light
• Dispersion

With operating frequency f=1 thz, two-dimensional (2D) graded eye-shape scatterers were firstly applied into photonic crystal waveguide (PCW) for slow light effect in two ways: (1) selecting group index n(g) from 31.4 to 95.0, low-dispersion bandwidth (n(g) varies within a 10% range) was got from 0.736 mu m to 2.334 mu m, and ultralow-dispersion bandwidth (n(g) varies within a 1% range) was got from 0.438 mu m to 0.945 mu m by grading the eye-shape scatterers along the longitudinal direction; (2) selecting group index n(g) from 32.1 to 98.3, low-dispersion bandwidth was got from 0.559 mu m to 1.765 mu m, and ultralow-dispersion bandwidth was got from 0.296 mu m to 0.661 mu m by grading the eye-shape scatterers along the transverse direction. The 20 graded structures can also used in asymmetrical structures and heterostructures for slow light effect.

• 出版日期2014
• 单位青岛大学