Title :
THz-emission probe of surface-electronic transitions in a topological insulator
Author :
Li-Guo Zhu ; Kubera, B. ; Kin Fai Mak ; Jie Shan
Author_Institution :
Inst. of Fluid Phys., China Acad. of Eng. Phys., Mianyang, China
Abstract :
Upon femtosecond laser pumping of a topological insulator Bi2Se3, we observed efficient THz generation from the surface electrons. By performing polarization-resolved studies on the emitted THz spectrum, two emission mechanisms are identified. THz emission spectroscopy provides a valuable spectroscopic tool for studies of the dynamics of the surface electrons in centrosymmetric topological insulators.
Keywords :
bismuth compounds; high-speed optical techniques; optical pumping; terahertz wave generation; terahertz wave spectra; topological insulators; Bi2Se3; THz emission spectroscopy; THz generation; THz-emission probe; centrosymmetric topological insulators; emission mechanisms; femtosecond laser pumping; spectroscopic tool; surface electrons; surface-electronic transitions; topological insulator; Laser excitation; Nonlinear optics; Optical pulses; Optical surface waves; Surface emitting lasers; Topological insulators; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665533
