Inverse design of an all-dielectric digitized terahertz optical power splitter by particle swarm optimization method

TL;DR

This paper presents an optimized all-dielectric terahertz power splitter using digitized metamaterials and particle swarm optimization, achieving low insertion loss and compact design suitable for integration in THz circuits.

Contribution

It introduces a novel digitized metamaterial-based THz power splitter optimized with particle swarm optimization, demonstrating high efficiency and CMOS compatibility.

Findings

Insertion loss less than 3.9 dB over 0.9-1.1 THz

Compact footprint of 400x350 μm²

Compatible with CMOS fabrication

Abstract

This letter proposes a 50:50 TE terahertz (THz) power splitter based on digitized metamaterials. The device is optimized using particle swarm optimization algorithm. The structure of the digitized metamaterials contains circular air holes in silicon slab which are deposited on silicon dioxide substrate. The optimized structure shows insertion loss (IL) of less than 3.9 dB over the frequency range of 0.9-1.1 THz. The proposed device has the footprint of 400 $\times$ 350 $\mu$m$^2$. The proposed device has excellent merits such as compactness, efficient, all-dielectric, and compatible with CMOS fabrication technologies. This device can be used as a vital component in most of the THz circuits to route THz waves.