First Measurement of the Non-instantaneous Response Time of a χ(3) Nonlinear Optical Effect
oleh: Harth A., Steinmeyer G., Ristau D., Hyyti J., Borchers B., Grunwald R., Bock M., Das Susanta K., Vockerodt T., Nagy T., Morgner U.
| Format: | Article |
|---|---|
| Diterbitkan: | EDP Sciences 2013-03-01 |
Deskripsi
The third harmonic of a few-cycle pulse, generated at different dielectric surfaces, is investigated using interferometric frequency-resolved optical gating. We present direct experimental evidence for a non-instantaneous nonlinear response in a TiO2 thin film whereas surface third-harmonic generation in a SiO2 sample does not show any indication for non-instanteneity. To the best of our knowledge, this constitutes the first report of a non-instantaneous nonlinear optical response of a dielectric optical material.