Open AccessPhase-matched sum frequency generation in strained silicon waveguides using their second-order nonlinear optical susceptibility
Author(s) -
Ivan Avrutsky,
Richard A. Soref
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.021707
Subject(s) - waveguide , materials science , second harmonic generation , optics , birefringence , silicon on insulator , silicon , silicon photonics , nonlinear optics , optoelectronics , sum frequency generation , physics , laser
Using analysis and numerical simulation, we have investigated near-infrared and mid-infrared second-harmonic generation (SHG) and sum frequency generation (SFG) in crystal silicon (SOI) waveguides that possess a strong second-order nonlinear susceptibility by virtue of a Si(3)N(4) straining layer applied directly to the top surface of the waveguide. This layer induces anisotropic compressive strain in the waveguide core. Using the technique of TE/TM mode birefringence, we have derived waveguide geometries for both slab and strip channel waveguides that offer perfect phase matching of three lightwaves for SHG/SFG along a uniform waveguide, thereby offering the prospect of efficient wavelength conversion in monolithic silicon photonics.