title: Low-reflection photonic-crystal taper for efficient coupling between guide sections of arbitrary widths.
abstract: We design and fabricate a new taper structure for adiabatic mode transformation in two-dimensional photonic-crystal waveguides patterned into a GaInAsP confining layer. The taper efficiency is validated by measurement of a reduction of the reflection between an access ridge and a photonic-crystal guide with one missing row from 6% to less than 1%. This taper is then incorporated into a 60 degrees bend; simulations demonstrate a 90% transmission between multimode ports.
authors.forename: A
authors.initials: A
authors.lastname: Talneau
authors.forename: Ph
authors.initials: P
authors.lastname: Lalanne
authors.forename: M
authors.initials: M
authors.lastname: Agio
authors.forename: C M
authors.initials: CM
authors.lastname: Soukoulis