title: Low propagation loss of 0.76 dB/mm in GaAs-based single-line-defect two-dimensional photonic crystal slab waveguides up to 1 cm in length.
abstract: Straight single-line-defect photonic crystal (PC) waveguides on GaAs slabs with lengths of 1, 4, and 10 mm have been fabricated. By controlling the Al content of a sacrificial AlGaAs clad layer and the wet etching duration, a PC core layer with a very smooth surface was obtained. Atomic force microscope images indicate that the roughness on the top surface is less than 1 nm. An extremely low propagation loss of 0.76 dB/mm for the GaAs-based PC waveguide was achieved.
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Sugimoto
authors.forename: Yu
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Naoki
authors.initials: N
authors.lastname: Ikeda
authors.forename: Yusui
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Asakawa
authors.forename: Kuon
authors.initials: K
authors.lastname: Inoue