Ultrafast broadband nonlinear optical properties and excited-state dynamics of two bis-chalcone derivatives

Abstract

The introduction of a benzene ring largely affects the excited-state absorption spectra and dynamics of these chromophores.

D–π–A type conjugated indandione derivatives: ultrafast broadband nonlinear absorption responses and transient dynamics

“…To further analyze the ultrafast dynamics of the two compounds, global and target analysis is employed to extract several relaxing processes from the TAS based on the above discussions, 11,[35][36][37][38] and the results are listed in Table 1. For INB3, ultrafast absorption is established within a pulse duration aer excitation, which is beyond the instrument response time (0.25 ps).…”

Ultrafast Nonlinear Optical Response and Carrier Dynamics in Layered Gallium Sulfide (GaS) Single-Crystalline Thin Films

“…The ultrafast nonlinear absorption properties of the multilayer β-GaS thin films were measured by open-aperture Z-scan technique. The Z-scan system in this study is similar to the pervious report (Shen et al, 2020). In brief, the laser was emitted from an optical parametric amplifier (Light Conversion ORPHEUS) pumped with a Yb:KGW femtosecond fiber laser (Light Conversion PHAROS-SP).…”

Piperonal chalcone derivative incorporating the pyrazolo[3,4-b]pyridine moiety; crystal structure, spectroscopic characterization and quantum chemical investigations

“…Among the organic compounds, chalcones stand out due to their high tendency to crystallize, resistance to laser damage, excellent second and third-order NLO responses, and extensive applications in biological and pharmaceutical fields. 5,13–15 Several experimental studies have been conducted on the NLO properties of various chalcones, and encouraging results have been reported for future applications such as nonlinear frequency conversion, nonlinear refraction, optical limiters, and SHG (15 times greater than urea). 5,8,16–20…”