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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1993),
  • paper QWH26

Excitonic dephasing and optical nonlinearity of semiconductor microcrystallites doped in glasses

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Abstract

It is very important to study the excitonic dephasing process in a zero-dimensional system in order to clarify optical nonlinearity because the nonlinear cross section is proportional to the product of the oscillator strength and the dephasing time for a two-level system.1 T2 is given by 1/T2=1/T2pure+ 1/2T1, where T2pure is the pure dephasing time due to, e.g., electron- phonon interaction and T2 is the energy relaxation time. We measured how T2 in CdS0.12Se0.88 microcrystallites doped in multicomponent glass depends on temperature and microcrystallite size, and we investigated dephasing mechanisms and the possibility of achieving a large optical nonlinearity by changing T2.

© 1993 Optical Society of America

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