Measurement of nonlinear optical Absorption and non-linear optical refraction in CdS and ZnSe using an electrically focus-tunable lens

Abstract

The non--linear optical properties of CdS and ZnSe using a new setup which we have named "f--scan". It uses an electrically--focus--tunable--lens instead of a mechanical translation stage. In this talk I will outline the theory, and experimental implementation.

Reflection Technique for Determination of Nonlinear-refractive Index of Thin-film Semiconductors Using an Electrically Focus-tunable Lens

“…For F-scan techniques, such as TF-scan (transmission F-scan) [9], DF-scan (differential F-scan) [10] and RF-scan (reflection F-scan) it is crucial to know how the focal length varies as function of a current applied to EFTL, in order to obtain correct values of two-photon absorption coefficient  and nonlinear-refractive index 𝑛 2 . Different techniques can be used to obtain the correct dependence.…”

Two-photon absorption coefficient determination using the differential F-scan technique

“…More recently, a new technique, that is a variation of Z-scan, was proposed. This method, which is called F-scan [10,11], use an electrically focus-tunable lens (EFTL) instead of a fixed lens to generate different focal points, allowing to replace the translation stage and leaving the sample fixed in space, i.e. eliminating mechanical movements from the setup.…”