DocumentCode
521267
Title
Observation of amplified stimulated terahertz emission in optically pumped epitaxial graphene heterostructures
Author
Karasawa, Hiromi ; Watanabe, Takayuki ; Otsuji, Taiichi ; Ryzhii, Maxim ; Satou, Akira ; Ryzhii, Victor
Author_Institution
RIEC Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
fYear
2010
fDate
16-21 May 2010
Firstpage
1
Lastpage
2
Abstract
We experimentally observed the fast relaxation and relatively slow recombination dynamics of photogenerated electrons/holes in an epitaxial graphene-on-Si heterostructure. The result is interpreted as an amplified stimulated THz emission and well supports the occurrence of negative dynamic conductivity in the terahertz spectral ranges.
Keywords
Charge carrier processes; Conductivity; Electron optics; Laser excitation; Optical films; Optical pumping; Phonons; Probes; Spontaneous emission; Stimulated emission;
fLanguage
English
Publisher
ieee
Conference_Titel
Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on
Conference_Location
San Jose, CA, USA
Print_ISBN
978-1-55752-890-2
Electronic_ISBN
978-1-55752-890-2
Type
conf
Filename
5500881
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