Abstract

In this paper, we present an optimal shape design method for a dielectric microlens which is used to focus an incoming infrared plane wave in wideband, by exploiting the finite difference time domain (FDTD) technique and the topology optimization technique. Topology optimization is a scheme to search an optimal shape by adjusting the material properties, which are design variables, within the design space. And by introducing the adjoint variable method, we can effectively calculate a derivative of the objective function with respect to the design variable. To verify the proposed method, a shape design problem of a dielectric microlens is tested when illuminated by a transverse electric (TE)-polarized infrared plane wave. In this problem, the design variable is the dielectric constant within the design space of a dielectric microlens. The design objective is to maximally focus the incoming magnetic field at a specific point in wideband.

© 2009 Optical Society of Korea

Topology optimization of dispersive plasmonic nanostructures in the time-domain

Emadeldeen Hassan and Antonio Calà Lesina
Opt. Express 30(11) 19557-19572 (2022)

Photonic crystal topological design for polarized and polarization-independent band gaps by gradient-free topology optimization

Yi Yan, Pai Liu, Xiaopeng Zhang, and Yangjun Luo
Opt. Express 29(16) 24861-24883 (2021)

Adjoint shape optimization applied to electromagnetic design

Christopher M. Lalau-Keraly, Samarth Bhargava, Owen D. Miller, and Eli Yablonovitch
Opt. Express 21(18) 21693-21701 (2013)

Inverse design of a 1D dielectric metasurface by topology optimization: fluctuations-trend analysis assisted by a diamond-square algorithm

K. Edee, M. Ben Rhouma, J.-A. Fan, M. Antezza, N. Gippius, E. Wang, J.-P. Plumey, G. Granet, and B. Guizal
J. Opt. Soc. Am. B 37(12) 3721-3728 (2020)

Topology optimized all-dielectric cloak: design, performances and modal picture of the invisibility effect

Benjamin Vial and Yang Hao
Opt. Express 23(18) 23551-23560 (2015)