Construction of a Compact, Fully Automatic non-linear Absorption Spectrometer to Measure the Two-Photon Absorption Coefficient
Instrumentation and Detectors
2019-09-27 v2 Applied Physics
Abstract
Using an Electrically Focus Tunable Lens (EFTL), an integrating sphere and a tunable femtosecond-pulse laser (Mai Tai HP), we were able to measure the degenerate two-photon absorption coefficient (in transmission) of CdS and ZnSe in a long range of wavelengths (690-1040 nm), with a 5 nm resolution, in less than 30 minutes. We compared our results with theoretical approaches for the dispersion relations of the non-linear properties of semiconductors, and found excellent agreement with the experimental results. The system has no moving parts, is highly compact, and is fully automated.
Cite
@article{arxiv.1909.09933,
title = {Construction of a Compact, Fully Automatic non-linear Absorption Spectrometer to Measure the Two-Photon Absorption Coefficient},
author = {Hernando Garcia and Juan Serna and Edgar Rueda},
journal= {arXiv preprint arXiv:1909.09933},
year = {2019}
}