Imperial College London

Professor Stepan Lucyszyn, FIEEE

Faculty of EngineeringDepartment of Electrical and Electronic Engineering

Professor of Millimetre-wave Systems
 
 
 
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Contact

 

+44 (0)20 7594 6167s.lucyszyn Website CV

 
 
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Assistant

 

Ms Susan Brace +44 (0)20 7594 6215

 
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Location

 

602Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Hu,
author = {Hu, F and Otter, W and Lucyszyn, S},
title = {Optically tunable THz frequency metamaterial absorber},
url = {http://hdl.handle.net/10044/1/25993},
}

RIS format (EndNote, RefMan)

TY  - CPAPER
AB - In this paper, we propose a metamaterial-based terahertz (THz) absorber with optically tunable absorbance. The unit cell of the structure consists of a cross-shaped resonator, a dielectric spacing layer for wave impedance matching and a high-resistivity silicon (HRS) substrate. Without illumination, the structure acts as a capacitive metal mesh filter that has minimum transmittance and maximum reflectance at its resonance frequency. When the HRS substrate is optically illuminated, its conductivity increases, effectively blocking transmission through the structure. Therefore, this device will have a low reflectance if the impedance is matched. The optimized structure shows a high absorbance of 98% at 0.25 THz in simulations. This concept can be used for the realization of dynamic control of absorbance and emissivity for applications in the THz and infrared (IR) range.
AU - Hu,F
AU - Otter,W
AU - Lucyszyn,S
TI - Optically tunable THz frequency metamaterial absorber
UR - http://hdl.handle.net/10044/1/25993
ER -