Photonic crystal directional couplers formed by InAlGaAs nano-rods.
This study demonstrates the use of photonic crystal directional couplers to separate light of wavelengths 1.31 and 1.55microm. The photonic crystal structure consists of InAlGaAs nano-rods arranged in square lattice. The coupling length of the light in the directional coupler at a wavelength of 1.31microm was designed to be four times greater than that at 1.55microm. This behavior helps in designing devices to split the two wavelengths. The devices are fabricated by e-beam lithography and conventional photolithography. The measurement results confirm that 1.31microm/1.55microm directional couplers can be realized in PC structures formed by nano-rods.
Chen
Chii-Chang
CC
Chen
Chih-Yu
CY
Wang
Wen-Kai
WK
Huang
Fan-Hsiu
FH
Lin
Cheng-Kuo
CK
Chiu
Wei-Yu
WY
Chan
Yi-Jen
YJ