Title :
Ultrafast refractive index control of THz graphene metamaterials
Author_Institution :
Dept. of Mech. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
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; fullerene devices; graphene; high-speed optical techniques; optical metamaterials; optical modulation; optical pumping; refractive index; terahertz wave devices; terahertz wave spectra; C; THz graphene-metamaterial hybrid devices; electrical conductivity; gate voltage; pump-induced effective negative conductivity; ultrafast refractive index control; ultrafast time-resolved optical-pump THz-probe spectroscopy; Graphene; Metamaterials; Optical pumping; Optical refraction; Optical variables control; Refractive index; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665724
