TY - JOUR AU - Apiratikul, Paveen AU - Wathen, Jeremiah J. AU - Porkolab, Gyorgy A. AU - Wang, Bohan AU - He, Lei AU - Murphy, Thomas E. AU - Richardson, Christopher J. K. TI - Enhanced continuous-wave four-wave mixing efficiency in nonlinear AlGaAs waveguides JO - Optics Express J2 - Opt. Express VL - 22 IS - 22 SP - 26814 EP - 26824 PY - 2014 DO - 10.1364/OE.22.026814 AB - Enhancements of the continuous-wave four-wave mixing conversion efficiency and bandwidth are accomplished through the application of plasma-assisted photoresist reflow to reduce the sidewall roughness of sub-square-micron-modal area waveguides. Nonlinear AlGaAs optical waveguides with a propagation loss of 0.56 dB/cm demonstrate continuous-wave four-wave mixing conversion efficiency of −7.8 dB. Narrow waveguides that are fabricated with engineered processing produce waveguides with uncoated sidewalls and anti-reflection coatings that show group velocity dispersion of +0.22 ps^2/m. Waveguides that are 5 mm long demonstrate broadband four-wave mixing conversion efficiencies with a half-width 3-dB bandwidth of 63.8 nm. UR - http://www.opticsexpress.org/abstract.cfm?URI=oe-22-22-26814 KW - Nonlinear optical materials Nonlinear optics, four-wave mixing Nonlinear optics, integrated optics Semiconductor nonlinear optics including MQW Nonlinear optical devices Waveguides LB - Apiratikul_OE_22_26814_2014 ER -