Research Project
Grant-in-Aid for Challenging Exploratory Research
i)Polarization selectivity of light-field-induced charge localization was investigated in an organic metal α-(BEDT-TTF)2I3 with a triangular lattice. Dependences of transient reflectivity spectra on polarizations of the 7-fs pump and probe lights indicate that a short-range charge order (CO) is efficiently induced from the metallic phase for the pump polarization perpendicular to the 1010-type CO axis. ii)The time-domain waveform of the terahertz (THz) electric field emitted from the same compound can be significantly modulated depending on incident fluence of femtosecond pulses. As revealed by time-resolved experiments, this modulation arises from the cooperative nature of photoinduced melting of the charge order accompanying quenching of infrared-activity of the intermolecular vibrations which strongly couple with the emission. iii)We have shown that the phonon absorption (for a short-range) and the THz generation (for a long-range) are available for detecting strong field effects.
All 2018 2017 2016 Other
All Journal Article (6 results) (of which Int'l Joint Research: 1 results, Peer Reviewed: 6 results, Acknowledgement Compliant: 4 results, Open Access: 1 results) Presentation (41 results) (of which Int'l Joint Research: 14 results, Invited: 9 results) Book (1 results) Remarks (2 results)
Appl. Phys. Lett.
Volume: 112 Issue: 9
10.1063/1.4995798
Phys. Rev. B
Volume: 95
Phys. Rev. B (rapid communication)
Volume: 印刷中
Volume: 95 Issue: 8 Pages: 0851491-5
10.1103/physrevb.95.085149
光学
Volume: 45 Pages: 425-431
Phisical Review B
Volume: 93 Issue: 16
10.1103/physrevb.93.165126
http://femto.phys.tohoku.ac.jp/