Abstract
A picosecond pump-probe nonlinear optical measurement is performed in SiO2/TiO2 one-dimensional photonic bandgap structures fabricated by a solgel method. Both high and low band edges were examined by varying the probe wavelengths and angle tuning was also employed to further clarify the mechanism of a nonlinear optical response. The third-order nonlinear optical response in one-dimensional photonic bandgap structures that comprise TiO2 films is responsible for the nonlinear optical transmissions at both bandgap edges, with an 8% decrease at the low-energy edge and a 4.5% increase at the high-energy edge for a 355 nm pump intensity of 430 MW/cm 2.
Original language | English |
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Pages (from-to) | 377-379 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 31 |
Issue number | 3 |
DOIs | |
State | Published - 1 Feb 2006 |