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  • 14th International Conference on Ultrafast Phenomena
  • Technical Digest (CD) (Optica Publishing Group, 2004),
  • paper ME50

Chirp Control of Free Carrier Dynamics in GaAs

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Abstract

The dynamics of free carriers in bulk GaAs was controlled by changing the chirp of the excitation light pulses having a duration in the 10 fs regime. Pump-probe measurements showed that the transmittance increases for negatively chirped pump pulses, which is in contrast to the trend observed with other materials. The result is explained by a combination of a pump-dump process and bandgap renormalization, and shows the possibility of new way to control nonlinear optical response of semiconductors.

© 2004 Optical Society of America

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