title: Vertical adiabatic transition between a silica planar waveguide and an electro-optic polymer fabricated with gray-scale lithography.
abstract: We report on a vertical adiabatic transition between silica planar waveguides and electro-optic (EO) polymer. Gray-scale lithography was used to pattern a polymer transition with an exponential profile. Excess losses of the order of 1 dB were measured, and good mode matching to simulation was observed. This configuration, which married the advantages of both silica and EO-polymer planar-optic technologies, demonstrates a new technique for fabricating hybrid active devices with high modulation speed, low insertion loss, and complex geometries.
authors.affiliation: Department of Electrical Engineering, University of California, Los Angeles, Los Angeles, California 90095, USA. dhchang89@alum.mit.edu
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Chang
authors.forename: Talal
authors.initials: T
authors.lastname: Azfar
authors.forename: Seong-Ku
authors.initials: SK
authors.lastname: Kim
authors.forename: Harold R
authors.initials: HR
authors.lastname: Fetterman
authors.forename: Cheng
authors.initials: C
authors.lastname: Zhang
authors.forename: William H
authors.initials: WH
authors.lastname: Steier