Fabrication-constrained nanophotonic inverse design

作者：Piggott, Alexander Y.^*; Petykiewicz, Jan; Su, Logan; Vuckovic, Jelena

来源：Scientific Reports, 2017, 7(1): 1786.

DOI：10.1038/s41598-017-01939-2

• MULTIMODE INTERFERENCE COUPLERS
• DOMAIN MAXWELLS EQUATIONS
• SILICON-ON-INSULATOR
• WIRE WAVE-GUIDES
• Y-JUNCTION
• OPTIMIZATION
• SPLITTER
• COMPACT
• ROBUST

A major difficulty in applying computational design methods to nanophotonic devices is ensuring that the resulting designs are fabricable. Here, we describe a general inverse design algorithm for nanophotonic devices that directly incorporates fabrication constraints. To demonstrate the capabilities of our method, we designed a spatial-mode demultiplexer, wavelength demultiplexer, and directional coupler. We also designed and experimentally demonstrated a compact, broadband 1 x 3 power splitter on a silicon photonics platform. The splitter has a footprint of only 3.8 x 2.5 mu m, and is well within the design rules of a typical silicon photonics process, with a minimum radius of curvature of 100 nm. Averaged over the designed wavelength range of 1400-1700 nm, our splitter has a measured insertion loss of 0.642 +/- 0.057 dB and power uniformity of 0.641 +/- 0.054 dB.

• 出版日期2017-5-11