Spectral and ASE Properties of 1-(4-Methylsulfonyl Phenyl)-3-(4-N, N Dimethyl Amino Phenyl)-2-Propen-1-One (MSPPP)

This work demonstrates the spectral and amplified spontaneous emission (ASE) properties of a new chalcone laser dye material of 1-(4-methylsulfonyl phenyl)-3-(4-N, N dimethyl amino phenyl)-2-propen-1-one (MSPPP). The absorption, fluorescence, Stokes’ shift and quantum yield were obtained using different organic solvents. The energy band gap was calculated and compared with that of 3-[4-(dimethylamino) phenyl]-1-phenyl-(2E)-propen- 1-one (DAPPP). These include absorption, fluorescence, stokes shift, and amplified spontaneous emission (ASE). The absorption spectra of MSPPP showed a wavelength band in the range 403–427 nm, whereas the fluorescence spectra exhibited a band at 472–533 nm. ASE was observed under pump pulse laser excitation, and the wavelengths were attuned from 511 to 548 nm.

Influence of Functional Groups on the Photophysical Properties of 1-(4-Methylsulfonyl Phenyl)-3-(4-n, n Dimethyl (amino Phenyl)-2-Propen-1-One Chalcone as Laser Dye

In this work, 1-(4-methylsulfonyl phenyl)-3-(4-N, N dimethyl amino phenyl)-2-propen-1-one (MSPPP) chalcone was synthesized and examined as optical materials. The absorption and fluorescence characteristics of MSPPP chalcone were recorded in ten different solvents. The influence of functional groups (FG) and solvents on their photophysical properties were investigated. These include absorption, fluorescence, stokes shift, and amplified spontaneous emission (ASE). The absorption spectra of MSPPP showed a wavelength band in the range 404 - 427 nm, whereas the fluorescence spectra exhibited a band at 473 - 533 nm. The FGs and solvents had an adorable effect on the optical properties of the synthesized materials. ASE was observed under pump pulse laser excitation, and the wavelengths were attuned from 511 to 548 nm.

Superior light-resistant dithieno[3,2-b:2′,3′-d]arsole-based polymers exhibiting ultrastable amplified spontaneous emission

Dithieno[3,2-b:2′,3′-d]arsole-based polymers show remarkably amplified spontaneous emission (ASE) stability under continuous pulse laser excitation for at least 15 h.

Stack-Induced Decrease in Three-Photon Luminescence of CdSe Nanowire

The research on the nonlinear optical (NLO) properties of CdSe nanowires (NWs) have received widespread attention of researchers. In this work, the higher NLO process of CdSe NW, including three-photon luminescence (3PL) and third harmonic generation (THG), was studied by femtosecond pulse laser excitation. Particularly, we find that different from the 3PL emission of single NW, which follows about fourth power of the excitation intensity, the 3PL of multiple NWs shows a saturation-like behavior. When the excitation power density is low, the slope of fitting curve is almost constant, but with the increase of excitation power, the slope decreases gradually. Since no energy transfer is observed between 3PL and other nonlinear responses, we think the phenomenon may owe to heat accumulation between the NWs.

Secondary plasma formation after single pulse laser ablation underwater and its advantages for laser induced breakdown spectroscopy (LIBS)

We demonstrated that well resolved and intense spectral lines can be obtained by single pulse laser excitation underwater if recording only secondary plasma emission using large acquisition gate widths.