Abstract

A tunable filter 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 picosecond optical Kerr effect. The response time of the tunable filter, approximately 10 ps, is within the measurement resolution. The maximum shift of optical channels is estimated to be 6 nm under excitation of $15.9\mathrm{GW}∕{\mathrm{cm}}^2$ pump intensity, which is in agreement with the theoretical prediction.

© 2006 Optical Society of America

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