Ultrafast optical modulation of efficiently-generated terahertz-wave in charge ordered organic ferroelectrics

Terahertz-wave generation in organic ferroelectrics α-(ET)2I3 is over 70 times more efficient than prototypical ZnTe. Ultrafast (< 0.1 ps) and sensitive (~ 40 %) photoresponse of the terahertz wave results from strongly-correlated electrons therein.