Two-color pump–probe experiments on silicon inverse opals
- 24 August 2005
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 87 (9), 091111
- https://doi.org/10.1063/1.2035873
Abstract
We present time-resolved pump–probe experiments in a transmission geometry using off-resonant excitation on very high-quality silicon inverse opals. We show that the nonlinear optical response can drastically be modified by tempering of the sample. The as-grown samples are dominated by an absorptive response with recovery times as short as one picosecond. For the tempered samples, both the relaxation and the scattering times increase, leading to a prominent dispersive response. Based on simple calculations using the Drude model, we estimate corresponding refractive index changes as large as .
Keywords
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