TY - JOUR
T1 - Band-gap renormalization and optical gain formation in highly excited CdSe
AU - Masumoto, Y.
AU - Fluegel, B.
AU - Meissner, K.
AU - Koch, S. W.
AU - Binder, R.
AU - Paul, A.
AU - Peyghambarian, N.
N1 - Funding Information:
Y.M. thanks Dr. F. Sasaki for his collaboration in this research project. This work was supported by the International Science Research Program no. 02044021 from the Ministry of Education, Science and Culture of Japan (MESC). The Arizona group was supported by the United States National Science Foundation, the United States Army Research Office, the Joint Services Optical Program, the NATO travel grant, and CPU time from the Pittsburgh Supercomputer Center. Both Tsukuba and Arizona groups are supported by a Grant for International Joint Research Project from the New Energy and Industrial Technology Development Organization (NEDO), Japan.
PY - 1992/2/2
Y1 - 1992/2/2
N2 - This paper reports the direct femtosecond observation of the dynamical bandgap renormalization and optical gain formation in a highly excited CdSe crystal. Interband excitation with 60 fs pulses results in broadening of the exciton at 0 fs, exciton bleaching and bandgap renormalization at 80 fs, and development of optical gain below the exciton level after 80 fs with rise time of 100 fs. At 380 fs, the optical gain reaches its maximum value and subsequently decreases slowly. Stimulated plasma luminescence has a peak around the energy where maximum gain is observed. The data are discussed in terms of plasma cooling, screening, state filling, and band-gap renormalization.
AB - This paper reports the direct femtosecond observation of the dynamical bandgap renormalization and optical gain formation in a highly excited CdSe crystal. Interband excitation with 60 fs pulses results in broadening of the exciton at 0 fs, exciton bleaching and bandgap renormalization at 80 fs, and development of optical gain below the exciton level after 80 fs with rise time of 100 fs. At 380 fs, the optical gain reaches its maximum value and subsequently decreases slowly. Stimulated plasma luminescence has a peak around the energy where maximum gain is observed. The data are discussed in terms of plasma cooling, screening, state filling, and band-gap renormalization.
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U2 - 10.1016/0022-0248(92)90846-B
DO - 10.1016/0022-0248(92)90846-B
M3 - Article
AN - SCOPUS:0027107456
VL - 117
SP - 732
EP - 737
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 1-4
ER -