title: Photonic crystal directional couplers formed by InAlGaAs nano-rods.
abstract: 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.
authors.forename: Chii-Chang
authors.initials: CC
authors.lastname: Chen
authors.forename: Chih-Yu
authors.initials: CY
authors.lastname: Chen
authors.forename: Wen-Kai
authors.initials: WK
authors.lastname: Wang
authors.forename: Fan-Hsiu
authors.initials: FH
authors.lastname: Huang
authors.forename: Cheng-Kuo
authors.initials: CK
authors.lastname: Lin
authors.forename: Wei-Yu
authors.initials: WY
authors.lastname: Chiu
authors.forename: Yi-Jen
authors.initials: YJ
authors.lastname: Chan