Title :
Hot-fermi carrier multiplication in monolayer graphene
Author :
Soonyoung Cha ; Seongchu Lim ; Jeongmook Choi ; Young Hee Lee ; Hyunyong Choi
Author_Institution :
Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
We report observation of thresholdless carrier multiplication in a monolayer graphene, where the carrier multiplication is driven by hot-carrier thermalization process. By utilizing ultrafast optical-pump and terahertz-probe spectroscopy, we directly demonstrate the quantitative carrier-multiplication efficiency.
Keywords :
graphene; high-speed optical techniques; monolayers; optical materials; optical pumping; terahertz spectroscopy; thermo-optical effects; C; hot-Fermi carrier multiplication; hot-carrier thermalization process; monolayer graphene; quantitative carrier-multiplication efficiency; terahertz-probe spectroscopy; thresholdless carrier multiplication; ultrafast optical-pump spectroscopy; Graphene; Hot carriers; Optical imaging; Optical pumping; Photonics; Spectroscopy; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2013 Conference on
Conference_Location :
San Jose, CA
