Title :
Stimulated terahertz emission from optically pumped graphene
Author :
Tombet, S. Boubanga ; Satou, A. ; Otsuji, T. ; Ryzhii, V.
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
Abstract :
We conduct time domain spectroscopy studies and shows that graphene sheet amplifies an incoming terahertz field. The graphene emission spectra dependency on laser pumping intensity shows a threshold like behavior, testifying the occurrence of the negative conductivity and the population inversion in the terahertz range, paving the way for a new class room temperature graphene based terahertz lasers.
Keywords :
graphene; optical pumping; population inversion; solid lasers; stimulated emission; time-domain analysis; C; graphene based terahertz lasers; graphene emission spectra dependency; graphene sheet; incoming terahertz field; laser pumping intensity; negative conductivity; optically pumped graphene; population inversion; stimulated terahertz emission; temperature 293 K to 298 K; terahertz range; threshold like behavior; time domain spectroscopy; Conductivity; Crystals; Integrated optics; Nonlinear optics; Optical pulses; Optical pumping; Stimulated emission;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6105193
