TY - JOUR
T1 - Two-Step Excitation Triggered by One-Photon Absorption on Linear Dispersion in Monolayer Graphene
AU - Koyama, Takeshi
AU - Mizutani, Kenta
AU - Ago, Hiroki
AU - Kishida, Hideo
N1 - Funding Information:
The authors would like to thank T. Matsuno for support in performing pump?probe measurements. This work was supported by MEXT/JSPS KAKENHI (Grant No. 26107520, 15H03530, and 15K13304) and PRESTO-JST.
PY - 2016/5/26
Y1 - 2016/5/26
N2 - We report the decrease in absorption caused by a near-infrared laser pulse in the visible region in monolayer graphene. This absorption decrease shows the existence of a two-step excitation process of carriers, in which one-photon absorption and Auger recombination sequentially occur. This process results from the linear dispersion nature of monolayer graphene. In addition, the monolayer graphene shows the ultrafast decay of carrier population. The observed properties are of importance for ultrafast optical switching utilizing the optical nonlinearity induced by carrier excitation.
AB - We report the decrease in absorption caused by a near-infrared laser pulse in the visible region in monolayer graphene. This absorption decrease shows the existence of a two-step excitation process of carriers, in which one-photon absorption and Auger recombination sequentially occur. This process results from the linear dispersion nature of monolayer graphene. In addition, the monolayer graphene shows the ultrafast decay of carrier population. The observed properties are of importance for ultrafast optical switching utilizing the optical nonlinearity induced by carrier excitation.
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U2 - 10.1021/acs.jpcc.6b01490
DO - 10.1021/acs.jpcc.6b01490
M3 - Article
AN - SCOPUS:84973121306
VL - 120
SP - 11225
EP - 11229
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 20
ER -