We report the design and optical characterization of fully suspended wire waveguides and photonic crystal (PhC) membranes fabricated on a gallium nitride layer grown on silicon substrate operating at 1.5 μm. W1-type PhC waveguides are coupled with suspended wires and are investigated using a standard end-fire setup. The experimental and theoretical dispersion properties of the propagating modes in the wires and photonic-crystal waveguides are shown. Modified L3 cavities with quality factors of up to 2200 and heterostructure cavities with quality factors of up to 5400 are experimentally demonstrated.
© 2012 Optical Society of America
Original Manuscript: August 10, 2012
Manuscript Accepted: September 24, 2012
Published: November 6, 2012
U. Dharanipathy, N. Vico Triviño, C. Yan, Z. Diao, J.-F. Carlin, N. Grandjean, and R. Houdré, "Near-infrared characterization of gallium nitride photonic-crystal waveguides and cavities," Opt. Lett. 37, 4588-4590 (2012)