Title :
Intense terahertz pulse-induced nonequilibrium BCS state in superconducting NbN
Author :
Matsunaga, Ryusuke ; Shimano, Ryo
Author_Institution :
Dept. of Phys., Univ. of Tokyo, Tokyo, Japan
Abstract :
We perform terahertz(THz)-pump-THz-probe spectroscopy to study ultrafast dynamics of BCS superconductor NbN. Resonant photo-injection of high density quasiparticles realized by the intense THz pump pulses results in a nonequilibrium BCS state.
Keywords :
BCS theory; high-speed optical techniques; niobium compounds; quasiparticles; superconducting materials; terahertz wave spectra; NbN; high-density quasiparticles; intense terahertz pulse-induced nonequilibrium BCS state; pump-THz-probe spectroscopy; resonant photoinjection; superconducting materials; ultrafast dynamics; Crystals; Optical films; Optical pulses; Optical pumping; Pump lasers; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
