Title: Phase matched nonlinear optics via patterning layered materials,
Abstract: The ease of integration coupled with large second-order nonlinear coefficient
of atomically thin layered 2D materials presents a unique opportunity to
realize second-order nonlinearity in silicon compatible integrated photonic
system. However, the phase matching requirement for second-order nonlinear
optical processes makes the nanophotonic design difficult. We show that by
nano-patterning the 2D material, quasi-phase matching can be achieved. Such
patterning based phase-matching could potentially compensate for inevitable
fabrication errors and significantly simplify the design process of the
nonlinear nano-photonic devices.