Interface modes for monolithic nonlinear photonics

A design methodology for obtaining versatile interface modes in monolithic structures is discussed. These modes are then utilized in conjunction with total internal reflection modes for phase-matching second-harmonic generation (SHG) in periodic layered media in AlxGa(1-x) As material system. Typical loss values of 2.71 cm(-1) for a TE-polarized pump and 4.26 cm(-1) for a TM-polarized pump around 1550 nm were obtained. Nonlinear characterizations are carried out using 2 ps, 30 ps, and a continuous wave pump for type-I and type-II interactions. Maximum SHG conversion efficiency of 1.14 x 10(4) % W-1 cm(-2) is observed for the type-II process with a pump power of 0.52 mW in a sample with a length of 2.0 mm. (C) 2015 Optical Society of America