Title :
Ultrafast refractive index control of terahertz graphene metamaterials
Author :
Seung Hoon Lee ; Jeongmook Choi ; Hyeon-Don Kim ; Hyunyong Choi ; Bumki Min
Author_Institution :
Dept. of Mech. Eng., KAIST, Daejeon, South Korea
fDate :
June 30 2013-July 4 2013
Abstract :
We present an ultrafast dynamics of THz graphene-metamaterial hybrid devices, where the refractive index and the conductivity are largely modulated by electrical and optical methods. Unprecedentedly large modulation of refractive index and the pump-induced effective negative conductivity are investigated by an ultrafast time-resolved optical-pump THz-probe spectroscopy with varying gate voltage.
Keywords :
electrical conductivity; electro-optical modulation; graphene; high-speed optical techniques; optical metamaterials; refractive index; time resolved spectroscopy; C; THz graphene-metamaterial hybrid devices; conductivity; pump-induced effective negative conductivity; refractive index modulation; terahertz graphene metamaterials; ultrafast refractive index control; ultrafast time-resolved optical-pump THz-probe spectroscopy; Graphene; Metamaterials; Optical pumping; Optical refraction; Optical sensors; Optical variables control; Refractive index;
Conference_Titel :
Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2013 Conference on
Conference_Location :
Kyoto
DOI :
10.1109/CLEOPR.2013.6600283
