Adjoint optimization of polarization-splitting grating couplers

Abstract

We have designed a polarization-splitting grating coupler (PSGC) in silicon-oninsulator (SOI) that has 1.2 dB peak loss in numerical simulations, which is the best simulated performance of PSGCs without a bottom reflector to the best of our knowledge. Adjoint method-based shape optimization enables us to explore complex geometries that are intractable with conventional design approaches. Physics-based process-independent knowledge of PSGCs is extracted from the adjoint optimization and can be transferred to other platforms with a minimum of effort.

arXiv comment15 pages, 17 figures

References in corpus (4)

• Inverse Design of Near Unity Efficiency Perfectly Vertical Grating Couplers
• Mapping the global design space of nanophotonic components using machine learning pattern recognition
• Leveraging Continuous Material Averaging for Inverse Electromagnetic Design
• PCA-Boosted Autoencoders for Nonlinear Dimensionality Reduction in Low Data Regimes