Hua Wu, Chong Li, Qiaoli Liu, Bai Liu, Jian Dong, Lei Shi, Xia Guo. Design of two-dimensional apodized grating couplers with Gaussian diffractive mode[J]. Chinese Optics Letters, 2015, 13(5): 050501
- Chinese Optics Letters
- Vol. 13, Issue 5, 050501 (2015)
Fig. 1. Schematic of an apodized grating coupler: (a) side view; (b) top view. (c) Relationship of the equivalent refractive index n eq , i Λ z , i f y , i
Fig. 2. Calculation results of the Gaussian function and the corresponding leakage factor distribution. Inset, relationship of the leakage factor α i f y , i
Fig. 3. Value distribution along the longitudinal grating period number of duty cycle of the i f y , i n eq , i Λ z , i
Fig. 4. (a) Coupling efficiency versus wavelength of the apodized grating couplers in three feature sizes; (b) electric field intensity distribution when the light propagates in the grating couplers with gold bottom mirror at the wavelength of 1550 nm.
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