1. Coherence decay measurement of v = 2 vibrons in solid parahydrogen.
- Author
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Kuma, Susumu, Miyamoto, Yuki, Nakajima, Kyo, Fukumi, Atsushi, Kawaguchi, Kentarou, Nakano, Itsuo, Sasao, Noboru, Tanaka, Minoru, Tang, Jian, Taniguchi, Takashi, Uetake, Satoshi, Wakabayashi, Tomonari, Yoshimi, Akihiro, and Yoshimura, Motohiko
- Subjects
COHERENCE (Physics) ,PHYSICAL measurements ,PARAHYDROGEN ,VIBRATIONAL spectra ,RAMAN spectroscopy ,ENERGY bands ,TEMPERATURE effect ,MOLECULAR structure - Abstract
The coherence decay of the v = 2 vibrational state (vibrons) of solid parahydrogen was measured via time-resolved coherent anti-Stokes Raman spectroscopy. We found that the decay curve has a non-exponential time profile in the time scale of 200 ns at a low temperature below 5 K and a low orthohydrogen impurity concentration (∼0.01%). This behavior, as also observed in the case of the v = 1 vibrons, represents a signature of band structure of the v = 2 state in the solid phase. The maximum coherence decay time of 50 ns in an exponential part was achieved, which shows excellence of the v = 2 state for coherent processes. We also found that finite temperatures, orthohydrogen impurities, and other structural inhomogeneity accelerate the decay, hiding the non-exponential feature of the vibron band. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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