Related Experiment Video
Updated: Jun 23, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Compact coherent perfect absorbers using topological guided-mode resonances
Chan Young Park1, Ki Young Lee1,2, Yu Sung Choi1
1Department of Physics, Hanyang University, Seoul, 04763, Korea.
Abstract:
We propose a topological coherent perfect absorber that enables almost ideal performance with remarkably compact device footprint and tight incident beams. The proposed structure is based on a topological junction of two guided-mode-resonance gratings. The structure provides robust systematic ways of remarkably tight lateral confinement of the absorbing resonance mode and near-perfect mode-match to arbitrary incident beams, which are unavailable with the conventional approaches. We demonstrate an exemplary amorphous Si thin-film structure that enables near-perfect absorptance modulation between 1.7 and 99% with device footprint width of 30-μm and 10-μm-wide incident Gaussian beams. Therefore, our proposed approach greatly improves practicality of guided-mode-resonance coherent perfect absorbers.
Related Concept Videos
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Characteristics of Series Resonant Circuit
Standing Waves in a Cavity
Parallel Resonance
Concept of Resonance and its Characteristics
Sound Waves: Resonance

