Strong thermal optical nonlinearity caused by CdSe nanoparticles synthesised in smectic ionic liquid crystal

Lyashchova, A.; Fedorenko, D.; Garbovskiy, Yuriy; Klimusheva, G. V.; Mirnaya, T. A.; Asaula, Vitaliy

doi:10.1080/02678292.2013.811548

Cited by 23 publications

(18 citation statements)

References 24 publications

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“…In the experiment, the linear polarization of the pump beam and the test beam was controlled by the polarizers 7 and 10 (see Figure 2) and coincided with the direction of the director of the LC cell (8). The intensity of the firstorder diffraction of the test beam was registered by a photodiode (11). The diffraction efficiency was estimated as the ratio of the intensities of the first order diffracted beam and the incident probe beam.…”

Section: Please Do Not Adjust Marginsmentioning

confidence: 99%

“…The temperature induced modulation of the effective refractive index [eqns. (10)(11)(12)] causes a phase modulation [eqn. (13)] that diffracts a probe beam with strength measured by the diffraction efficiency parameter η [eqn.…”

Section: Varying the Concentration Of Gnpsmentioning

confidence: 99%

“…This nonlinear refractive index is related to the modulation of effective refractive index in the liquid crystal implicitly through eqns. (10)(11)(12)(13)(14)(15)(16). The temperature induced modulation of the effective refractive index [eqns.…”

Section: Varying the Concentration Of Gnpsmentioning

confidence: 99%

“…For example, nanoparticles dispersed in smectic LCs are known to form stable nanocomposites with large optical nonlinearity and fast response times. 11,12 A cholesteric liquid crystal based plasmonic thermometer that exploits the localized surface plasmon of dispersed gold nanorods have been recently demonstrated. 29 Suspension of GNPs in nematic LCs have been shown to exhibit large thermal nonlinearities with second order nonlinear refractive index, n 2 of up to -2×10 -5 cm 2 W -1 .…”

Section: Introductionmentioning

confidence: 99%

“…From the spatial temperature and orientation distribution, the corresponding refractive index grating is obtained using the Extended Cauchy model detailed in eqns. (10)(11)(12). The total phase shift of the incident probe beam of wavenumber k resulting from this refractive index grating is determined using the expression…”

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confidence: 99%

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Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles – an experimental and numerical investigation

Kurochkin

Murugesan

Bennett

et al. 2016

Phys. Chem. Chem. Phys.

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In this work the mechanisms leading to the enhancement of optical nonlinearity of nematic liquid crystalline material through localized heating by doping the liquid crystals (LCs) with gold nanoparticles (GNPs) is investigated. We present some experimental and theoretical results on the effect of voltage and nanoparticle concentration on the nonlinear response of the GNP-LC suspensions. The optical nonlinearity of these systems is characterized by diffraction measurements and the second order nonlinear refractive index, n 2 is used to compare systems with different configurations and operating conditions. A theoretical model based on heat diffusion that takes into account the intensity and finite size of the incident beam, the nanoparticle concentration dependent absorbance of the GNP doped LC systems and the presence of bounding substrates is developed and validated. We use the model to discuss possibilities of enhancing further the optical nonlinearity.

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Section: Please Do Not Adjust Marginsmentioning

confidence: 99%

Section: Varying the Concentration Of Gnpsmentioning

confidence: 99%

Section: Varying the Concentration Of Gnpsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles – an experimental and numerical investigation

Kurochkin

Murugesan

Bennett

et al. 2016

Phys. Chem. Chem. Phys.

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Third-order nonlinear optical response of Ag–CdSe/PVA hybrid nanocomposite

Tripathi

Kaur

et al. 2015

Appl. Phys. A

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Hybrid nanocomposites of II-VI semiconductor nanoparticles are gaining great interest in nonlinear optoelectronic devices. Present work includes the characterization of CdSe polymer nanocomposite prepared by chemical in situ technique. From X-ray diffraction, the hexagonal wurtzite structure of nanoparticles has been confirmed with spherical morphology from transmission electron microscopy. Ag-CdSe hybrid polymer nanocomposite has been prepared chemically at different Ag concentrations. The presence of Ag in hybrid nanocomposite has been confirmed with energy-dispersive X-ray spectroscopy. The effect of varying Ag concentration on the linear and nonlinear optical properties of the nanocomposites has been studied. In linear optical parameters, the linear absorption coefficient, refractive index, extinction coefficient and optical conductivity have been calculated. The third-order nonlinear optical properties have been observed with open-and closed-aperture Z-scan technique. The large nonlinear refractive index *10 -5 cm 2 /W with self-focusing behaviour is due to the combined effect of quantum confinement and thermo-optical effects. The enhanced nonlinearity with increasing Ag content is due to the surface plasmon resonance, which enhances the local electric field near the nanoparticle surface. Thus, Ag-CdSe hybrid polymer nanocomposite has favourable nonlinear optical properties for various optoelectronic applications.

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Electronic, optical and spectroscopic properties of N-dialkyl-imidazolium hexafluorophosphate (CNMIM.PF6) ionic liquid crystal molecules investigated by computational methods

Gautam,

Mishra,

Thapa

et al. 2023

J Mol Model

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Strong thermal optical nonlinearity caused by CdSe nanoparticles synthesised in smectic ionic liquid crystal

Cited by 23 publications

References 24 publications

Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles – an experimental and numerical investigation

Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles – an experimental and numerical investigation

Third-order nonlinear optical response of Ag–CdSe/PVA hybrid nanocomposite

Electronic, optical and spectroscopic properties of N-dialkyl-imidazolium hexafluorophosphate (CNMIM.PF6) ionic liquid crystal molecules investigated by computational methods

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