Transient absorption and higher-order nonlinearities in silver nanoplatelets

Jayabalan, J.; Singh, Asha; Chari, Rama; Khan, Salahuddin; Srivastava, Himanshu; Oak, S. M.
May 2009
Applied Physics Letters;5/4/2009, Vol. 94 Issue 18, p181902
Academic Journal
We show that the imaginary parts of higher-order optical nonlinearities and their decay times can be determined by a time-intensity domain analysis of the conventional transient absorption data. Using this method we have measured the values and decay times of third, fifth and seventh-order nonlinear susceptibilities of silver nanoplatelets in water. The origin of these higher-order nonlinearities is explained using a two-temperature model.


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