Large spatial self-phase modulation in castor oil enhanced by gold nanoparticles

Alencar, Márcio A. R. C.; Nascimento, Cesar; Chávez-Cerda, Sabino; Silva, Monique G. A. da; Meneghetti, Mário R.; Hickmann, Jandir M.

doi:10.1117/12.647000

Cited by 16 publications

(5 citation statements)

References 15 publications

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“…´-This value is consistent with the typical values expected for thermally induced NLO parameters, where the value of the thermally induced nonlinear refractive index in [38] was determined to be about 10 cm W. 6 2 -Furthermore, compared with the nonlinear refractive index measured in other studies on avocado, sesame, olive, and castor oils [8,14,43], our measurement of the VCKO second-order nonlinear refractive index shows higher NLO properties. Using the same approach as described in [37], the error in calculating n th 2, was considered to be the error of N I, together with the error in calculating L , eff which corresponds to the error of the absorption coefficient.…”

Section: Resultssupporting

confidence: 88%

Investigating the nonlinear optical response of virgin cherry kernel oil and its application to detecting adulteration

Hassan,

Haddad,

Golestanifar

et al. 2024

Phys. Scr.

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The nonlinear optical (NLO) response of materials is the basis for their use in various applications, including optical switching, optical data storage, and optical limiting. Additionally, it can be used as an innovative method of authentication. In this study, the NLO properties of virgin cherry kernel oil (VCKO) were studied through the observation of spatial self-phase modulation (SSPM) diffraction rings using a 532 nm continuous-wave laser beam. Based on the intensity-dependent number of symmetric diffraction rings, the nonlinear refraction coefficient and thermo-optical coefficient of VCKO were estimated to be 3.81×10-6 cm2/W and 5.34×10-4 K-1 , respectively, for the first time according to the authors' knowledge. Furthermore, we employed the SSPM technique for adulteration detection in the VCKO by analyzing its NLO properties. To accomplish this, we prepared different adulterated samples by mixing VCKO with cheaper commercial oils such as virgin sunflower oil (VSFO) and virgin canola oil (VCO) at various concentration ratios. In mixed VCKO samples that were adulterated, the measured NLO parameters were correlated highly with the amount of adulteration. The results confirm the ability of the SSPM technique to determine the degree of adulteration in oil samples by measuring and comparing their NLO properties. In addition, our results indicate that cherry kernel oil can be a viable candidate as a nonlinear medium for optical applications.

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Section: Resultssupporting

confidence: 88%

Investigating the nonlinear optical response of virgin cherry kernel oil and its application to detecting adulteration

Hassan,

Haddad,

Golestanifar

et al. 2024

Phys. Scr.

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“…The linear absorption spectrum of castor oil in the visible and near infrared region is presented in figure 1. Recently, we showed that castor oil is a very good stabilizer for colloidal systems containing gold nanoparticles and that these colloids present a large spatial self-phase modulation effect 14 . …”

Section: Castor Oil Propertiesmentioning

confidence: 99%

Thermal optical nonlinearity enhanced by gold nanoparticles

et al. 2006

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We report on the observation of a large thermal nonlinearity of an organic material enhanced by the presence of gold nanoparticles. The studied system consisted of a colloid of castor oil and gold particles with average diameter of 10 nm, with filling factor of 4.0x10 -5 . Z-scan measurements were performed for an excitation wavelength tuned at 810 nm in the CW regime. It was observed that this colloidal system presents a large thermal nonlinear refractive index, which was equal to -7.4x10 -8 cm 2 /W. This value is about 41 times larger than the n 2 of the host material. The thermo-optic coefficient of the colloid was also evaluated, and a large enhancement was observed in its value owing to the presence of the gold nanoparticles in the organic material.

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“…The reason for the above discussion about simple and textbook topics in nonlinear optics is directly related to the significance of this article, which was instigated by reported studies of SSPM in molecular liquids and nanomaterials in suspension (refs , and refs therein), using either CW or ML optical sources, the latter generally operating with pulse repetition rates of several MHz. SSPM is a well-known nonlinear optical phenomenon that has been thoroughly studied in a variety of materials since the early 1980s, with pioneering studies carried out in liquid crystals, besides several others. − In a recent publication, we had the opportunity to clarify the role of thermal and nonthermal nonlinearities in ethanol. In another work, we fully discussed the physical mechanism responsible for SSPM in liquid suspensions of 2D transition metal dichalcogenide (TMD) by comparing SSPM results for several different materials, with a clear indication of thermal nonlinearities when CW or ML high repetition-rate lasers are employed.…”

Section: Introductionmentioning

confidence: 99%

Spatial Self-Phase Modulation of Optical Vortex Beams in Liquid Suspensions of Semiconducting, Semimetallic, and Metallic 2D Nanoflakes due to a Kerr-like Nonlinearity

Campos,

Bautista,

Amaral

et al. 2024

J. Phys. Chem. C

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Optical vortex beam (OVB) propagation through liquid suspensions of semiconducting, semimetallic, and metallic 2D nanoflakes, MoS 2 , NbS 2 , and WTe 2 , respectively, was studied under different excitation conditions regarding the optical absorption region. It is demonstrated that the OVB generated using a spatial light modulator propagates under intensitydependent refraction originating from thermal nonlinearity. Besides the nanomaterial's suspensions, measurements were also performed with pristine solvents to corroborate the thermally induced intensity dependence arising from light absorption in the studied media.

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Large spatial self-phase modulation in castor oil enhanced by gold nanoparticles

Cited by 16 publications

References 15 publications

Investigating the nonlinear optical response of virgin cherry kernel oil and its application to detecting adulteration

Investigating the nonlinear optical response of virgin cherry kernel oil and its application to detecting adulteration

Thermal optical nonlinearity enhanced by gold nanoparticles

Spatial Self-Phase Modulation of Optical Vortex Beams in Liquid Suspensions of Semiconducting, Semimetallic, and Metallic 2D Nanoflakes due to a Kerr-like Nonlinearity

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