title: 1x2 Multimode interference couplers based on semiconductor hollow waveguides formed from omnidirectional reflectors.
abstract: A 1x2 hollow multimode interference (MMI) coupler based on semiconductor hollow waveguides formed from omnidirectional reflectors (SHOW-ODR) is demonstrated. The device has a shorter coupling length than a conventional silicon-on-insulator MMI coupler. A 2 dB uniformity was achieved at operating wavelengths between 1520 and 1562 nm. The device exhibited a weak polarization dependence in the TE and TM modes.
authors.affiliation: Department of Optics and Photonics, National Central University, 300, Jhong-Da Road Jhongli 320, Taiwan.
authors.forename: Shih-Shou
authors.initials: SS
authors.lastname: Lo
authors.forename: Chii-Chang
authors.initials: CC
authors.lastname: Chen