Title :
Gain enhancement effect of surface plasmon polaritons on terahertz stimulated emission in optically pumped monolayer graphene
Author :
Kawasaki, T. ; Watanabe, Toshio ; Fukushima, Tetsuya ; Yabe, Yuhei ; Tombet, Stephane Albon Boubanga ; Satou, Akira ; Dubinov, Alexander A. ; Aleshkin, Vladimir Ya ; Mitin, Vladimir ; Ryzhii, Victor ; Otsuji, Taiichi
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
Abstract :
Giant gain enhancement effect of surface plasmon polaritons (SPPs) on terahertz (THz) stimulated emission in optically pumped monolayer graphene has been experimentally studied. We observed the spatial distribution of the THz probe pulse intensities under linear polarization of optical pump and THz probe pulses. It was clearly observed that an intense THz probe pulse was detected only at the area where the incoming TM mode THz probe pulse being capable of exciting the SPPs. The observed gain factor ~50 is in fair agreement with theoretical calculations.
Keywords :
graphene; monolayers; optical pumping; polaritons; surface plasmons; terahertz wave spectra; C; THz probe pulse intensity; giant gain enhancement effect; linear polarization; optically pumped monolayer graphene; surface plasmon polaritons; terahertz stimulated emission; Graphene; Optical polarization; Optical pulses; Optical pumping; Optical reflection; Probes; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
