TY - JOUR
T1 - Optical stark effect of exciton in semiconducting single-walled carbon nanotubes
AU - Matsumoto, Shinji
AU - Matsui, Hiroyuki
AU - Maeda, Atsushi
AU - Takenobu, Taishi
AU - Iwasa, Yoshihiro
AU - Miyata, Yasumitsu
AU - Kataura, Hiromichi
AU - Maniwa, Yutaka
AU - Okamoto, Hiroshi
PY - 2006/5/19
Y1 - 2006/5/19
N2 - An instantaneous blue shift of exciton absorption due to the optical Stark effect was observed in isolated semiconducting single-walled carbon nanotubes (SWNTs) by using a femtosecond (fs) pump-probe spectroscopy. From the analysis of time profiles of transient absorption changes, the photoinduced shift and the dipole moment of the exciton transition were evaluated as ∼1.1 meV for the pump fluence of 34 μJ/cm2 and ∼6 eÅ, respectively. Such a large dipole moment as well as ultrafast recovery of real carrier excitations suggests high potential of SWNTs for an ultrafast optical-switching material.
AB - An instantaneous blue shift of exciton absorption due to the optical Stark effect was observed in isolated semiconducting single-walled carbon nanotubes (SWNTs) by using a femtosecond (fs) pump-probe spectroscopy. From the analysis of time profiles of transient absorption changes, the photoinduced shift and the dipole moment of the exciton transition were evaluated as ∼1.1 meV for the pump fluence of 34 μJ/cm2 and ∼6 eÅ, respectively. Such a large dipole moment as well as ultrafast recovery of real carrier excitations suggests high potential of SWNTs for an ultrafast optical-switching material.
KW - Carbon nanotube
KW - Exciton
KW - Femtosecond spectroscopy
KW - Nonlinear optical response
KW - Optical Stark effect
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U2 - 10.1143/JJAP.45.L513
DO - 10.1143/JJAP.45.L513
M3 - Article
AN - SCOPUS:33745300425
SN - 0021-4922
VL - 45
JO - Japanese Journal of Applied Physics, Part 2: Letters
JF - Japanese Journal of Applied Physics, Part 2: Letters
IS - 20-23
ER -