Title :
Terahertz wave polarization control by a metal wire-grid polarizer based on VO2/Al2O3
Author :
Jun-Hwan Shin ; Kiwon Moon ; Eui Su Lee ; Kyung Hyun Park
Author_Institution :
THz Photonics Creative Res. Center, ETRI, Daejeon, South Korea
Abstract :
A wire-grid polarizer based on VO2/Al2O3 (0001) is fabricated. It is experimentally confirmed that the polarizer controls the amplitude of the transmitted THz wave by changing the temperature. The device performance was estimated through degree of polarization (DOP), extinction ratio (ER), and the temperature dependence of field amplitude modulation depth (MD). From the measurements, the fabricated device shows a potential to be applicable to the optical modulator or polarizer in the THz frequency regime.
Keywords :
aluminium compounds; electromagnetic wave polarisation; terahertz materials; vanadium compounds; Al2O3; VO2; degree of polarization; extinction ratio; field amplitude modulation depth; metal wire-grid polarizer; terahertz wave polarization control; Extinction ratio; Modulation; Optical device fabrication; Optical films; Optical filters; Optical imaging; Temperature measurement;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956261
