SECOND HARMONIC GENERATION IN <font>ZnO</font> NANORODS

Das, Malyaj; Rana, Shivani; Sen, Pratima

doi:10.1142/s0218863510005315

Cited by 9 publications

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References 14 publications

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“…[8][9][10] ZnO has a wurtzite crystal structure and belongs to the 6 mm point group, which leads to three components of the second-order nonlinear susceptibility, d 131 , d 311 , and d 333 . 11 The large second-order nonlinear coefficients and wide transparency range make ZnO a good candidate for SHG from the infrared to the near-ultraviolet region. 12 There have been a variety of studies on the SHG in ZnO nanostructures such as nanolayer, 13 nanowire, 9 and nanorods.…”

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confidence: 99%

Near-resonant second-order nonlinear susceptibility in c-axis oriented ZnO nanorods

Liu

Wang

Long

et al. 2014

Applied Physics Letters

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Articles you may be interested inEffect of Lorentz local field for optical second order nonlinear susceptibility in ZnO nanorod Second-order susceptibilities of ZnO nanorods from forward second-harmonic scattering J. Appl. Phys. 105, 063531 (2009); 10.1063/1.3093903 Second and third order nonlinear optical properties of microrod ZnO films deposited on sapphire substrates by thermal oxidation of metallic zinc

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confidence: 99%

Near-resonant second-order nonlinear susceptibility in c-axis oriented ZnO nanorods

Liu

Wang

Long

et al. 2014

Applied Physics Letters

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“…The index i refers to the components of the SHG field, whereas j and k correspond to the Cartesian components of the fundamental laser fields. While earlier investigations with deposited samples highlighted NLO properties of ZnO there are only a limited number of theoretical models − focusing on the determination of χ (2) . Here we develop a simple tight binding model based on the linear combination of atomic orbitals (LCAO) approach to calculate the static bulk χ ijk (2) components of ZnO nanoparticles.…”

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Optical Second Harmonic Generation from ZnO Nanofluids—A Tight Binding Approach in Determining Bulk χ⁽²⁾

et al. 2015

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ZnO nanomaterials exhibit attractive optical properties that are important in the realm of catalysis and nanotechnology involving the developments of solar cells, chemisensors and other optoelectronic devices. Herein, we provide experimental evidence of resonantly enhanced optical second harmonic generation (SHG) from a ZnO nanofluid. Moreover, we develop a simple theoretical model, based on tight binding theory, to calculate the bulk static second order susceptibility components, χ ijk(2) , of ZnO nanoparticles (NPs). We show that a tight binding approach, which is sensitive to local structure, can be used to determine χ ijk(2) of polar semiconducting crystals. The ratio, χ zzz (2) /χ zyy (2) = 3.07, obtained based on this approach is in excellent agreement with results for bulk ZnO crystals previously reported. However, our finding shows that there is a discrepancy between the theoretical prediction and experimental observation for the ZnO nanofluid. By modifying the ZnO nanoparticle surface via adsorption of an organic dye we further demonstrate that this discrepancy is due to a surface contribution to the overall SHG signal. Lastly, while the applicability of the tight binding method to calculate bulk χ ijk(2) for ZnO is demonstrated here, the potential advantage of this method to characterize surface second order susceptibility is also discussed. ■ INTRODUCTIONMetal oxide nanoparticles (NPs) 1,2 have become popular due to their wide range of applications in optoelectronics, 3−6 catalysis, 7,8 and environmental remediation. 9,10 Nanoparticles, in general, are of fundamental scientific interest because they represent an intermediate state of matter bridging the electronic and optical properties between those of the bulk materials, and those of molecules and small clusters. 11,12 Nanoparticles exhibit a large surface area to volume ratio, and therefore, surface chemistry plays a key role in various applications of NPs. Most common applications of metal oxide NPs are in the realm of nanotechnology and pollution remediation. At the heart of nanotechnology is the development of dye sensitized solar cells (DSSCs) 3−5 and sensors 13−15 using semiconducting NPs as the building blocks. An important example of metal oxides for this purpose is ZnO NPs. Zinc oxide exhibits numerous optoelectronic properties that are attractive for device performances. 2 These include a direct and wide band gap (3.37 eV at room temperature), large exciton binding energy (∼60 meV), large piezoelectric constants, and of particular interest, which provides the basis of this scientific exploration, a large nonlinear optical (NLO) response.While an extensive amount of research with respect to synthesis and design 9,16,17 of ZnO nanomaterials are on the rise, demand 1,2 for obtaining fundamental knowledge related to the optoelectronic properties of nanomaterials is at its apex. An interesting and useful aspect of ZnO NPs is that they are noncentrosymmetric and thus, exhibit strong NLO properties. This entails frequency doubling; i.e., a second ...

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Investigating mechanism of photo refractivity in Mg substituted ZnO thin films using pump and probe technique

Sharma,

Gupta,

Chowdhuri

et al. 2024

Materials Chemistry and Physics

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SECOND HARMONIC GENERATION IN ZnO NANORODS

Cited by 9 publications

References 14 publications

Near-resonant second-order nonlinear susceptibility in c-axis oriented ZnO nanorods

Near-resonant second-order nonlinear susceptibility in c-axis oriented ZnO nanorods

Optical Second Harmonic Generation from ZnO Nanofluids—A Tight Binding Approach in Determining Bulk χ⁽²⁾

Investigating mechanism of photo refractivity in Mg substituted ZnO thin films using pump and probe technique

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SECOND HARMONIC GENERATION IN ZnO NANORODS

Cited by 9 publications

References 14 publications

Near-resonant second-order nonlinear susceptibility in c-axis oriented ZnO nanorods

Near-resonant second-order nonlinear susceptibility in c-axis oriented ZnO nanorods

Optical Second Harmonic Generation from ZnO Nanofluids—A Tight Binding Approach in Determining Bulk χ(2)

Investigating mechanism of photo refractivity in Mg substituted ZnO thin films using pump and probe technique

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Optical Second Harmonic Generation from ZnO Nanofluids—A Tight Binding Approach in Determining Bulk χ⁽²⁾