measurements in Schiff’s base derivatives: Effect of metal nanoparticles

Sudheesh, P.; Chandrasekharan, K.

doi:10.1016/j.ssc.2011.11.030

Cited by 14 publications

(5 citation statements)

References 30 publications

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“…The value of χ (3) and n 2 of the samples are of the order of 10 −13 and 10 −11 esu, respectively. These are comparable to or superior to the reported values [17, 18]. The obtained values for the excited cross‐section ( σ ex ) and the ground state cross‐section ( σ g ) for all the samples are in the order of 10 −18 and 10 −21 cm 2 , respectively, measured from the procedure described elsewhere [19].…”

Section: Resultssupporting

confidence: 86%

Natural dye‐doped poly(methyl methacrylate) microparticles for nonlinear optics

Sujith

Shebi

Sudheesh³

et al. 2014

Micro & Nano Letters

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Poly(methyl methacrylate) (PMMA) microparticles doped with natural dyes such as paprika and chlorophyll have been prepared by the solvent evaporation technique. A mixture of paprika and chlorophyll in different ratios was also doped with microparticles. The distribution of the diameter of particles spreads in the range of 3-7 μm. UV-visible spectroscopic studies have shown that the absorption wavelength is shifted to a longer wavelength region when the paprika content increases in the dopant mixture. The nonlinear optical properties of the samples were investigated. It is found that the coloured particles have remarkable optical nonlinearities in the nanosecond regime because of the interaction of double bonds in PMMA with the delocalised π-electron system of dyes.

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Section: Resultssupporting

confidence: 86%

Natural dye‐doped poly(methyl methacrylate) microparticles for nonlinear optics

Sujith

Shebi

Sudheesh³

et al. 2014

Micro & Nano Letters

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“…By changing laser fluenece, laser wavelength, laser repetition rate, and focal length of focusing lens, one may control the morphology, size and concentration of nanoparticles (Jeon and Yeh 1998;Prochazka et al 1997;Haider et al 2011). The present study of isolated particles allows the directed observation of ultrafast coherent nonlineaties associated with the plasmon as well as incoherent heating effects (Pelton et al 2005;Sudheesh and Chandrasekharan 2012;Souza et al 2008). Therefore, the laser ablated suspended metal nanoparticles prepared in liquid phase can be used for optical limiting (OL) devises.…”

Section: Introductionmentioning

confidence: 98%

Thermo optical properties of Ag nanoparticles produced by pulsed laser ablation

2015

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The linear and nonlinear optical properties of silver nanoparticles have been investigated experimentally. Colloidal nanoparticle samples were synthesized by laser ablation at various fluences. The samples were characterized by linear absorption spectroscopy, transmission electron microscopy and dynamic light scattering methods. The behavior of nonlinear refractive index of nanoparticles was studied using the close and open Z-scan techniques by low power CW laser beam. Observation of asymmetrical configurations of the Z-scan curve indicates that nonlinear refraction occurring in the Ag samples is related to the thermo optical process. In addition, the observed optical limiting behavior is due to nonlinear refraction of samples arising from thermal lens formation under low power CW excitation. The optimum position for samples as the optical limiter based on self-defocusing effect is the valley point. When the illumination laser power is low, the self-defocusing effect is mainly dominated. Actually laser fluence variation during the ablation procedure leads to concentration variation of nanoparticles in suspensions which in turn affect the optical properties of samples. The dependence of the nonlinear properties on morphological parameters, metal concentration, and particle size have been explained by experimental results.

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“…The discovery of incredibly efficient NLO materials has increased research efforts in several areas, including optical communication, harmonic generation, frequency mixing, laser lithography, attracted significant interest due to their ease of crystallization in huge symmetries and shapes, which can pretty well pave the way for quick changes in the physical and chemical properties of the compounds, and have therefore become a highly investigated field. [7,8] The properties of both organic and inorganic materials, such as a high laser damage threshold, optical transparency, and high efficiency, are shared by semi-organic materials, which are currently being investigated. All amino acids, except for glycine, have chiral carbon atoms and may crystallize in the non-centrosymmetric space group, making complexes of amino acids with inorganic salts of interest as materials for optical second harmonic generation (SHG).…”

Section: Introductionmentioning

confidence: 99%

“…Because of the straightforward synthesis process, quick nonlinear response, and likelihood of various device fabrications, researchers have recently focused mostly on organic crystals [5,6]. The donor and acceptor groups of organic molecules are connected by a π-electron conjugated system, which is extensively polarizable and may help trigger the organic crystals for nonlinear optical applications [7,8]. The properties of both organic and inorganic materials, such as a high laser damage threshold, optical transparency, and high efficiency, are shared by semi-organic materials, which are currently being investigated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Growth, Thermal and Third‐Order Nonlinear Optical Studies of Bisglycine Lithium Perchlorate Single Crystal

Revathi,

George,

Philip

et al. 2023

Cryst. Res. Technol.

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The synthesis as well as the results of the investigations on the structure as well as properties ‐ thermal, mechanical, surface and nonlinear optical of semiorganic bisglycine lithium perchlorate (BGLP) single crystals are herein recorded. BGLP single crystal with dimensions 14× 3 × 2 mm3 has been synthesized and its structure and lattice parameters have been identified with the aid of X‐ray diffraction. The vibrational spectrum of BGLP has been investigated making use of FT‐IR and FT‐Raman spectra. Optical transmittance and absorption is examined by UV–vis spectroscopy with thickness 2 mm and it is shown that the crystal is highly transparent with a lower cut‐off of 287 nm. The optical bandgap is evaluated as 5.7 eV. The dielectric constant is found to show variations with frequency as well as temperature, which remains constant at high frequencies. Dielectric loss is found to decrease with the applied electric field. BGLP is manifested to be thermally stable up to 256 °C as revealed from thermogravimetric analyses. The 2D nucleation mechanism in the growth of BGLP crystals is understood from etching studies. By implementing Z‐scan studies with a He─Ne laser as a source, the nonlinear absorption coefficient, susceptibility, and third order nonlinear refractive index are all computed.

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measurements in Schiff’s base derivatives: Effect of metal nanoparticles

Cited by 14 publications

References 30 publications

Natural dye‐doped poly(methyl methacrylate) microparticles for nonlinear optics

Natural dye‐doped poly(methyl methacrylate) microparticles for nonlinear optics

Thermo optical properties of Ag nanoparticles produced by pulsed laser ablation

Synthesis, Growth, Thermal and Third‐Order Nonlinear Optical Studies of Bisglycine Lithium Perchlorate Single Crystal

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