In this paper, the effects of shapes and orientations of rods on absolute PBGs in 2D square lattice are studied. By replacing round rods with square rods, which sides are along with the direction of elementary lattices vectors, the absolute PBGs in 2D square lattice with wave vector in periodic plane and off periodic plane have been studied and then through changing the square rods orientation, the changing of the width and position of PBG has been obtained.
LU Xiao-dong HAN Pei-de QUAN Yu-jun YE Zhi-cheng DOU Jin-feng WU Li ZHAO Chun-hua
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers.We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide.The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm.Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm.Therefore,our invariable coupling power technique is simpler than Intel's.
RAN Qi-jiang HAN Pei-de QUAN Yu-jun GAO Li-peng ZENG Fan-ping ZHAO Chun-hua
