Apodized grating coupler using fully-etched nanostructures

Wu Hua^{1, 2}, Li Chong¹, Li Zhi-Yong³, Guo Xia^{1, 4, †,}

Variations of coupling efficiency of apodized grating coupler (a) and uniform grating coupler with wavelength at n_eq = 2.4 of grating grooves (b), for different coupling angles.