Third-order optical nonlinearity properties of CdCl2-modifed Ge–Sb–S chalcogenide glasses
Source abstract
Abstract
We developed a new type of chalcohalide glasses with physicochemical and nonlinear optical properties that are tunable by composition. It is found that more than 60 mol.% CdCl 2 heavy metal halide can be dissolved into the ternary Ge–Sb–S system and forming stable glasses. The visible-light transparency range is extended to shorter wavelengths with the addition of CdCl 2 , which is beneficial for the optical quality control and infra-red (IR) system alignment. The third-order optical nonlinearity (TONL) is studied using the femtosecond Z-scan method. The results show that both the nonlinear refractive index and two photon absorption co-efficient decrease with CdCl 2. Benefiting from the favorable property-tailoring effects of CdCl 2, the TONL figure of merit (FOM) can be improved to meet the requirement (FOM < 1) for all-optical switching and IR photonic applications.
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Research context
OpenAlex topics: Nonlinear Optical Materials Studies · Phase-change materials and chalcogenides · Nonlinear Optical Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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