Title :
Spiral metamaterial for tunable circular dichroism
Author :
Kan, Tianze ; Isozaki, Akihiro ; Kanda, Natsuki ; Nemoto, N. ; Konishi, Katsumi ; Kuwata-Gonokami, Makoto ; Matsumoto, Kaname ; Shimoyama, Isao
Author_Institution :
Univ. of Tokyo, Tokyo, Japan
Abstract :
We propose an electrostatically actuated spiral structures as a metamaterial for circularly polarized light in Terahertz (THz) frequency. Actuation of the spiral structures changes their geometry, and produces a tunable chirality resulting in circular dichroism, which is the differential absorption between the left and right circularly polarized light. Results of the THz-spectroscopy confirmed that the ON/OFF of circular dichroism was achieved with the proposing structures.
Keywords :
absorption; circular dichroism; terahertz metamaterials; THz-spectroscopy; circularly polarized light; differential absorption; electrostatically actuated spiral structure; spiral metamaterial; terahertz frequency; tunable chirality; tunable circular dichroism; Electrodes; Metamaterials; Micromechanical devices; Optical filters; Optical polarization; Optical sensors; Spirals;
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2013 IEEE 26th International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4673-5654-1
DOI :
10.1109/MEMSYS.2013.6474339
