Abstract

An all-optical tunable photonic bandgap microcavity made from a two-dimensional polystyrene photonic crystal is fabricated by focused ion beam etching. The pump and probe scheme is adopted to measure tunability based on the femtosecond optical Kerr effect. An ultrafast response time of less than 120fs is achieved for the tunable photonic bandgap microcavity. The microcavity resonant wavelength shifts 3.1nm under excitation of 9.4GWcm2 pump intensity, which is in agreement with the theoretical prediction.

© 2006 Optical Society of America

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