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Title: Ultrafast spectroscopy of coherent phonon in carbon nanotubes using sub-5-fs visible pulses

In the last two decades, nano materials are attracting many scientists’ interest for both basic and application viewpoints. In order to understand the properties of nano systems it is needed to understand the dynamic properties which control the specific properties of the systems. All the primary processes in nano systems are taking place in femtosecond regime. Our group has been able to stably generate visible to near-infrared sub-5-fs laser pulses using a noncollinear optical parametric amplifier (NOPA) by the combination of various novel techniques including non-collinear optical parametric amplifier, pulse compression by a prism pair and grating pair. We apply the sub-5-fs pulses to study real-time coherent phonon in a one-dimensional system of carbon nanotubes. We determine exciton-phonon coupling mechanisms by observing the breathing mode in semiconducting carbon nanotubes and show the effect of electronic transition affected by the vibrational mode.
Authors:
 [1] ;  [2] ;  [3] ;  [2]
  1. Advanced Ultrafast Laser Research Center, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585 (Japan)
  2. (Japan)
  3. (China)
Publication Date:
OSTI Identifier:
22494579
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1709; Journal Issue: 1; Conference: IRAGO conference 2015: 360 degree outlook on critical scientific and technological challenges for a sustainable society, Aichi (Japan), 22-23 Oct 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CARBON NANOTUBES; COUPLING; GRATINGS; LASERS; PARAMETRIC AMPLIFIERS; PHONONS; PULSES; SPECTROSCOPY