Analytical predictions for nonlinear optical processes in silicon slot waveguides

作者：Priye Vishnu; Malviya Nishit^*; Mickelson Alan

来源：Journal of Computational Electronics, 2018, 17(2): 857-865.

DOI：10.1007/s10825-018-1150-8

• Slot waveguide
• Silicon photonics
• Nonlinear optical waveguides
• Singular perturbation technique (SPT)
• Optical device simulation

Analytical expressions derived for dispersion relations and fields are used to obtain analytical predictions for the performance of modulators fabricated in second-order (chi(2)) and third-order (chi(3)) nonlinear materials filled into waveguide slot of silicon-on-insulator waveguides. Analytical expressions are used to model the electron-optical modulation and Kerr effect on slot waveguides for the theoretical modeling. The results obtained for slot waveguides with second-order nonlinearities are compared with those obtained under the planar-waveguide approximations reported as in earlier work. Also, exhaustive solutions are obtained for third-order nonlinear slot waveguides. This work employs long standing and reliable mathematical methods to develop the computational modal of photonics integrated devices. Moreover, the present work allows one a new perspective on design of various optical devices based on low-index sub-wavelength nonlinear slot waveguides.

• 出版日期2018-6