TY - JOUR
T1 - Optical Kerr response to multi pump pulses on GaAs weakly confined exciton
AU - Kanno, Atsushi
AU - Katouf, Redouane
AU - Kojima, Osamu
AU - Ishi-Hayase, Junko
AU - Tsuchiya, Masahiro
AU - Isu, Toshiro
PY - 2009/9/30
Y1 - 2009/9/30
N2 - We investigate optical Kerr response under two-pump pulse irradiation induced by GaAs weakly confined exciton. Ultrafast response times of the order of picoseconds are observed despite long exciton lifetime of the order of nanoseconds. The difference may be attributed to the relaxation mechanisms between population relaxation and nonlinear relaxation of excitons. In addition, the observed temporal shapes of the optical Kerr response are conserved under irradiation by a preceding pulse that forms the exciton population. The pulse separation of the optical Kerr response between two pump pulses is achieved to be 800 fs, which corresponds to a signal train of 1.25 Tbits per second.
AB - We investigate optical Kerr response under two-pump pulse irradiation induced by GaAs weakly confined exciton. Ultrafast response times of the order of picoseconds are observed despite long exciton lifetime of the order of nanoseconds. The difference may be attributed to the relaxation mechanisms between population relaxation and nonlinear relaxation of excitons. In addition, the observed temporal shapes of the optical Kerr response are conserved under irradiation by a preceding pulse that forms the exciton population. The pulse separation of the optical Kerr response between two pump pulses is achieved to be 800 fs, which corresponds to a signal train of 1.25 Tbits per second.
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U2 - 10.1002/pssc.200881515
DO - 10.1002/pssc.200881515
M3 - Conference article
AN - SCOPUS:70349431436
SN - 1862-6351
VL - 6
SP - 1509
EP - 1512
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
IS - 6
T2 - 35th International Symposium on Compound Semiconductors, ISCS 2008
Y2 - 21 September 2008 through 24 September 2008
ER -