Variation of the sign of nonlinear refraction of carbon disulfide in the short-wavelength region

Author:

Kim V. V.1,Bundulis A.2ORCID,Grube J.2,Ganeev R. A.134ORCID

Affiliation:

1. University of Latvia

2. Institute of Solid State Physics

3. Voronezh State University

4. National Research University

Abstract

We report the spectral dependence of the nonlinear refractive index (γ) of carbon disulfide (CS2) in the range of 400–1100 nm in the case of the femtosecond laser pulses. The positive sign of γ dominated in the region between 600 and 1100 nm. At a shorter wavelength (500 nm), we observed the intensity-dependent competition between the fifth-order related self-defocusing and third-order related self-focusing. Further decrease of the wavelength of the probe pulses (400 nm) resulted in domination of the negative nonlinear refraction. The fifth-order nonlinear refractive index of CS2 at λ = 400 nm (η = −4×10−22 cm4 W−2) is determined.

Funder

European Regional Development Fund

Latvijas Zinātnes Padome

Horizon 2020 Framework Programme

Publisher

Optica Publishing Group

Subject

Electronic, Optical and Magnetic Materials

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