Function Expansion Based Topology Optimization of Optical and Millimeter-wave Circuit Devices

In order to develop high performance optical and millimeter-wave circuit devices, topology optimal design methods combined with computer simulation techniques are attracting a lot of attentions and have been intensively studied because of their potential to develop novel innovative devices beyond human knowledge. We have originally developed function-expansion-based topology optimization technique and have applied it to design of optical circuit devices. Recently, we have extended our topology optimization approach to design millimeter-wave devices based on NRD guide. In this paper, we present recent progress of our topology optimization method for optical and millimeter-wave circuit devices.