Three-photon absorption and nonlinear refraction of BaMgF₄ in the ultraviolet region

Abstract

The nonlinear refraction and nonlinear absorption phenomena are investigated in BaMgF(4) single crystal using the Z-scan technique in the ultraviolet region with a pulsed laser at 400 nm with 1 ps pulse duration. The remarkable nonlinear absorption behavior is identified to be three-photon absorption under the experimental conditions. In addition, both nonlinear refraction and nonlinear absorption have relatively large values and possess small anisotropy along three different crystallographic axes. The large values of nonlinear refractive index are demonstrated through the self-phase modulation effect.

The quest towards epitaxial BaMgF4 thin films: exploring MOCVD as a chemical scalable approach for the deposition of complex metal fluoride films

“…5 Thus BMF crystals have been studied as new solid-state laser materials in the UV region. [6][7][8][9][10][11] These properties make BMF a good candidate for integrated optical devices. Although the pure compound doesn't exhibit ferromagnetism, it has been recently demonstrated that this property can be induced by substitutional doping of Mg by a magnetic transition metal ion such as Mn.…”

Nonresonant and Resonant Nonlinear Absorption of CdSe-Based Nanoplatelets

“…As shown in the figure, all the OA 𝑍scan data exhibit a decrease of transmittance with respect to the focus, indicating the occurrence of multiphoton absorption. [23] We attempt to fit the experimental data according to the following equations under the assumption of pure 2PA and pure three-photon absorption (3PA), [24] respectively,…”