Title :
Ultrafast mid-infrared investigations on the surface Dirac fermions with topological phase transition
Author :
Jun Park;Sangwan Sim;Nikesh Koirala;Matthew Brahlek;Seongshik Oh;Hyunyong Choi
Author_Institution :
School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea
Abstract :
We present ultrafast optical studies of the Dirac surface dynamics in a topological insulator Bi2Se3 via optical pump mid-infrared probe spectroscopy. We observed largely enhanced carrier relaxation when the topological-phase transition takes place.
Conference_Titel :
Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2015 11th Conference on
DOI :
10.1109/CLEOPR.2015.7375968
