Title :
Direct observation of terahertz wavefront converted by a metal hole array
Author :
Shintaro Hisatake;Hai Huy Nguyen Pham;Tadao Nagatsuma
Author_Institution :
Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
Abstract :
Wavefront conversion by a metal hole array (MHA) has been experimentally observed via a visualization of the continuous-wave terahertz (THz) field. At the resonant frequency of the MHA, curved wavefront of the THz wave (125 GHz) emitted from a horn antenna has been converted to a plane wavefront. Near field visualization at the MHA surface (transmission side) revealed that the field re-emitted from the MHA oscillates in phase. We experimentally confirmed that the MHA acts as a planar THz wave collimator.
Keywords :
"Arrays","Horn antennas","Optical sensors","Metals","Visualization","Optical surface waves","Optical polarization"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327817
