Doping-type dependence of phonon dephasing dynamics in Si

  • Keiko Kato
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Atsushi Ishizawa
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Katsuya Oguri
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Kouta Tateno
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Takehiko Tawara
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Hideki Gotoh
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Masahiro Kitajima
    National Defense Academy of Japan 2 Department of Applied Physics, School of Applied Science, , Hashirimizu 1-10-20, Yokosuka, Kanagawa 239-8686, Japan
  • Hidetoshi Nakano
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
  • Tetsuomi Sogawa
    Nippon Telegraph and Telephone Corporation 1 NTT Basic Research Laboratories, , 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan

Bibliographic Information

Published
2011-04-04
Resource Type
journal article
DOI
  • 10.1063/1.3574533
Publisher
AIP Publishing

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<jats:p>We studied the dephasing dynamics of coherent phonons in n-type, p-type, and intrinsic Si using time-resolved reflectivity measurements with sub-10 fs laser pulses. The dephasing time of the coherent phonons increases (decreases) for n-type (p-type) doping compared with that of intrinsic Si, while the frequencies of the coherent phonons exhibit a redshift for both types of doping. These doping-induced changes in the coherent phonon dynamics are observed when the carrier concentration exceeds 1019 cm−3. The doping-type dependent changes in the dephasing time are attributed to the interconduction and intervalence band transitions in n-type and p-type Si, respectively.</jats:p>

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