Journal Article Development of an optical time-resolved measurement system under high-pressure and low-temperature with a piston-cylinder pressure cell

Tsuchiya, Satoshi  ,  Kino, Yohei  ,  Nakagawa, Koichi  ,  Nakagawa, Daisuke  ,  Yamada, Jun-ichi  ,  Toda, Yasunori

87 ( 4 )  , p.043104 , 2016 , American Institute of Physics (AIP)
To perform the femtosecond pump-probe spectroscopy under high pressure and low temperature, we constructed a measurement system with a piston cylinder type pressurecell installing an optical fiber bundle. The applied pressure was achieved to 6 kbar and the cell was cooled down to 15 K. Several demonstrations revealed that broadening and change of polarization of pulse (duration of ∼120 fs) owing to the dispersions in the fiber bundle are much small indicating that those have little influence on the measurement of carrier relaxation dynamics. In the measurements of κ-(BEDT-TTF)2Cu(NCS)2 under 1.3 kbar at 43 K, we have successfully detected the polarization anisotropy of the carrier relaxation dynamics and estimated the decay time in the same way as the normal measurement.

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