Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1541210 | Optics Communications | 2008 | 7 Pages |
Abstract
We report on new schemes for pump-probe photo-thermal lens methods aimed for measuring the two-photon absorption coefficient of a given material. We show that by focusing a probe beam in the presence of a nearly collimated pump beam, we create a thermal lens which yields measurement of the two-photon absorption coefficient of nitrobenzene of (3.9 ± 0.3) 10â10 cm/W at 532 nm. We also show that when the pump field is focused in the presence of a nearly collimated probe beam the width of the z-scan signature of a two-photon absorption process is nearly one order of magnitude smaller than that of a one-photon process. We show experimental evidence of the effect obtained for nitrobenzene.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
A. Marcano O, K. Williams, N. Melikechi,