Function-expansion-based topology optimization of three-dimensional optical waveguide devices with multi-layered structure considering layer thickness

Multi-Symmetric Level (MSL) Optimization Technique Based on Genetic Algorithm for Photonic Devices Design

“…The Perfeclty Matched Layer (PML) is introduced by s parameter, where in PML region is defined by (2), where ω 0 is the angular frequency, d the PML thickness, and R the theoretical reflection coefficient and ρ is the distance from an internal PML element to the last field simulation and ▽ is modified nabla operator [32].…”

“…The computational and telecommunications data processing and store have worldwide challenged for the design of novel devices [1]. This is usually started by the modelling and simulation of those three-dimensional devices under certain application and fabrication conditions [2]. It also occurs in highcontrast based on index material to scale down ultra-compact optical devices for photonic integrated chip (PIC) for optical communications.…”

Function expansion based topology optimization of NRD guide device using hybrid method of harmony search and gradient method

“…In recent years, optimization technique utilizing computer simulation has attracted a lot of attention to develop high performance electromagnetic devices [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]. Among such optimization techniques, topology optimization method has the highest design freedom and has potential to develop innovative devices beyond human knowledge.…”

“…Among such optimization techniques, topology optimization method has the highest design freedom and has potential to develop innovative devices beyond human knowledge. We have developed topology optimization based on function expansion method for design of photonic devices [14,17,18,19,20,21]. However, when we apply this gradient based topology optimization method to NRD guide [14], an appropriate initial solution is often required to find global optimal solution due to multimodal nature of an objective function compared with design of photonic devices [26].…”