Effect of Charge and Dielectric Constant on Linear and Nonlinear Optical Properties of Two Dyes

Sharifi, Soheil; Nezhad, Mehdi Khazaei; Sangsefedi, Seyed Ahmad; Rakhshanizadeh, Forough

doi:10.1007/s11664-019-07201-x

Cited by 20 publications

(3 citation statements)

References 37 publications

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“…Nonlinear optical characteristics can be determined using transmission and absorption measurements [7]. Methods such as diffraction ring patterns, thermal lenses, and Z-scan open and closed apertures are considered alternative methods for determining NLO [8]. Compared to the other methods, Z-scan is better since it uses a low-incident intensity laser beam to determine the nonlinear optical constants and provides valuable information on transient process dynamics and response time [9].…”

Section: Introductionmentioning

confidence: 99%

Linear and Nonlinear Optical Properties of PVA:SA Blend Reinforced by TiO2 Nanoparticles Prepared by Flower Extract of Aloe Vera for Optoelectronic Applications

et al. 2023

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In this study, a polyvinyl alcohol–sodium alginate blend, PVA:SA 3:1 (w:w), was doped with different contents of TiO2 nanoparticles (NPs) prepared by aloe vera leaf extract to form the investigated nanocomposites. The nonlinear parameters of third-order susceptibility (χ(3)) and refractive index (n2) were detected by using UV-Vis spectroscopy and Z-scan techniques. Some different optical parameters were also determined, including the refractive index (n), optical dielectric parameters, volume and surface energy loss functions, and some others. The best solar skin protection factor (SSPF) was investigated by 5 wt.% of TiO2 NPs doped in PVA:SA 3:1, which was about 84.6% compared to the corresponding value of the host blend (41%). The studied nanocomposites were examined for their utility in the optical limiting of CUT-OFF laser filters utilizing a continuous He-Ne laser working at 632.2 nm. As a result, our finding demonstrated that TiO2 NPs doped in the host blend of PVA:SA positively influences a laser light blocking for the investigated laser source. Using the estimated gap energies values, different models were used to deduce theoretical values of the linear refractive index (n). The presence of Ti peaks in the EDX spectrum confirmed the doping of TiO2 NPs in the nanocomposites. SEM showed that the TiO2 NPs are homogeneously dispersed through the host blend with some agglomerates. XRD spectra showed that the values of the lattice strain εstr. detected at 2ϴ = 19.78° are 0.058, 0.055, and 0.060, corresponding to 1, 3, and 5 wt.% of TiO2 NPs doped in the PVA:SA blend.

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Section: Introductionmentioning

confidence: 99%

Linear and Nonlinear Optical Properties of PVA:SA Blend Reinforced by TiO2 Nanoparticles Prepared by Flower Extract of Aloe Vera for Optoelectronic Applications

et al. 2023

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“…In general, the value of β could be related to reverse saturable absorption (RSA) which depended on two-photon absorption (TPA) and excited state absorption (ESA). It should be noted that the BTB had weak absorbance at 530 nm; indicating TPA and ESA can produce RSA [26,28].…”

Section: Discussionmentioning

confidence: 99%

“…Significant effect of solvent on measured value of dipole moment of a solute was proved [25,26]. Magnitude of dipole moment of solute changes in solvent relative to gas medium and also depend on dielectric constant of solvents.…”

Section: Theoretical Studiesmentioning

confidence: 99%

Environmental effect on optical properties of bromothymol blue: experimental and simulation

Shoraka,

Roknabadi,

Shahtahmassebi

et al. 2024

Opt Quant Electron

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Effects of environmental properties on linear and nonlinear response of Bromothymol blue (BTB) were studied. The role of optical band gap and dielectric constant, as well as thermal conductivity on optical properties of BTB molecule and cetyltrimethylammonium bromide (CTAB) with BTB complex were discussed using Z-scan instrument with 532 nm wavelength and 80 mW power, spectrophotometer and FT-IR spectra. The orders of nonlinear absorption coefficient, β, and nonlinear refractive index, n 2 , of BTB were obtained 10 -12 cm 2 /W and 10 -7 cm/W, respectively. The reverse saturable absorption is the main factors in the appearance of β. It was observed, enhancement up to 5 time in dielectric constant of environment cause reduction of about 6 time in nonlinear absorption and about 2 time in nonlinear refraction coefficient of solution. Moreover, the complex of CTAB can reduce optical band gap of BTB by 0.7eV. Results of DFT calculations have performed, via B3LYP method and 6-311G(d,p) basis, show enhancement of dipole moment of BTB with increase of dielectric constant of environment.

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The Influence of Anionic, Cationic Surfactant and AOT/Water/Heptane Reverse Micelle on Photophysical Properties of Crocin: Compare with RPMI Effect

2020

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Effect of Charge and Dielectric Constant on Linear and Nonlinear Optical Properties of Two Dyes

Cited by 20 publications

References 37 publications

Linear and Nonlinear Optical Properties of PVA:SA Blend Reinforced by TiO2 Nanoparticles Prepared by Flower Extract of Aloe Vera for Optoelectronic Applications

Linear and Nonlinear Optical Properties of PVA:SA Blend Reinforced by TiO2 Nanoparticles Prepared by Flower Extract of Aloe Vera for Optoelectronic Applications

Environmental effect on optical properties of bromothymol blue: experimental and simulation

The Influence of Anionic, Cationic Surfactant and AOT/Water/Heptane Reverse Micelle on Photophysical Properties of Crocin: Compare with RPMI Effect

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