title: Optical properties of epitaxial CaxBa1-xNb2O6thin film based rib-waveguide structure on (001) MgO for electro-optic applications.
abstract: In this work, optical properties of epitaxial CaxBa1-xNb2O6, CBN (x = 0.28) thin film based waveguides are studied at 1550 nm optical communications wavelength. CBN thin films are deposited epitaxially on MgO substrates using Pulsed Laser Deposition and characterized by prism coupling to extract the refractive index and propagation loss. It is shown that the 2 µm-thick epitaxial CBN thin films have a refractive index close to the bulk form and the CBN planar waveguides have a propagation loss of 4.3 ± 0.5 dB/cm. 1 cm-long rib waveguide structures were fabricated using a high density plasma etching. Their propagation losses were measured by the cutback method at 8.4 ± 0.6 dB/cm.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Vigne
authors.forename: Nadir
authors.initials: N
authors.lastname: Hossain
authors.forename: Faezeh
authors.initials: F
authors.lastname: Fesharaki
authors.forename: S M Humayun
authors.initials: SM
authors.lastname: Kabir
authors.forename: Joëlle
authors.initials: J
authors.lastname: Margot
authors.forename: Ke
authors.initials: K
authors.lastname: Wu
authors.forename: Mohamed
authors.initials: M
authors.lastname: Chaker