Title :
Bandwidth reconfigurable THz filter employing phase-change material
Author :
Varittha Sanphuang;Nima Ghalichechian;Niru K. Nahar;John L. Volakis
Author_Institution :
ElectroScience Laboratory, Department of Electrical and Computer Engineering, The Ohio State University, Columbus, 43212, United States
fDate :
7/1/2015 12:00:00 AM
Abstract :
We propose a bandwidth reconfigurable spatial filter using frequency selective surfaces (FSS) combined with phase-change materials (PCMs), vanadium dioxide (VO2) for advanced terahertz (THz) applications. The FSS filter is simulated using sapphire as substrate and employs circular loops FSS with VO2 rings in between. Simulations of this filter show bandwidth difference in the frequency range of 0.4 - 0.75 THz. As a demonstration, we tested a reconfigurable FSS geometry and observed a 15% in bandwidth change as per design.
Keywords :
"Frequency selective surfaces","Bandwidth","Optical filters","Microwave filters","Films","Filtering theory","Phase change materials"
Conference_Titel :
Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015 IEEE International Symposium on
DOI :
10.1109/APS.2015.7305533
