10 fs ultrafast all-optical switching in polystyrene nonlinear photonic crystals

Ye Liu; Fei Qin; Zhi-Yi Wei; Qing-Bo Meng; Dao-Zhong Zhang; Zhi-Yuan Li
September 2009
Applied Physics Letters;9/28/2009, Vol. 95 Issue 13, p131116
Academic Journal
An ultrafast all-optical switching with the response time on the order of 10 fs is demonstrated in a three-dimensional opal polystyrene nonlinear photonic crystal by means of precise femtosecond pump-probe technique. The switching is realized by the shift in the photonic band gap under external optical pumping of 8 fs Ti:sapphire pulse laser with a peak pump power of 20.6 GW/cm2. The good performance of optical switching is attributed to the very strong and fast Kerr nonlinear optical response of the polystyrene material.


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