Luminescence enhancement in ZnO nanocrystals by polarized light

Chawla, Santa; Karar, N.; Chander, Harish

doi:10.1016/j.physb.2009.08.054

Cited by 15 publications

(6 citation statements)

References 28 publications

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“…Both, Figure 7 and Table I show that the E g values are very close to those usually reported for room temperature bulk ZnO bandgap energy. The most accepted value for this energy is 3.37 eV, [38][39][40] although there is a spread on reports between 3.1 to 3.4 eV. [41][42][43] However Figure 7 shows a clear decrease of E g values when the electrodeposition temperature was incremented.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of Nanostructured ZnO Thin Films from Dimethylsulfoxide Solution: Effect of Temperatures on the Morphological and Optical Properties

Tello

Gómez

Muñoz

et al. 2012

J. Electrochem. Soc.

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The effects of bath temperature on the electrodeposition of zinc oxide (ZnO) thin films from zinc perchlorate and molecular oxygen, dissolved in dimethylsulfoxide, are reported. The obtained films were highly compact and homogeneous. Scanning electron microscopy images showed that they were formed by nanometric crystallites whose sizes are dependent on bath temperature. Inversely dependence was found between the band-gap (Eg) of the semiconductor with estimated diameters (D) of the crystallites, which corresponds well with quantum confinement effects.

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Section: Resultsmentioning

confidence: 99%

Electrodeposition of Nanostructured ZnO Thin Films from Dimethylsulfoxide Solution: Effect of Temperatures on the Morphological and Optical Properties

Tello

Gómez

Muñoz

et al. 2012

J. Electrochem. Soc.

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“…Polarization dependence of PL emission in ZnS/ZnO nanostructures has also not been reported, so far and such studies are essential to indicate symmetry of luminescence centers and relaxation of excited carriers in phosphors. 16 However, in this work we have studied the temperature dependence of PL emissions in various nanostructures, namely, in organic-inorganic ZnS(ethylenediamine) 0.5 nanosheets, wurtzite (WZ) ZnS nanosheets, ZnS/ZnO nanocomposite, and WZ ZnO nanostructures, at the temperature range of 273-333 K. ZnS(ethylenediamine) 0.5 nanosheets have been synthesized by hydrothermal method and the other materials are obtained by simple thermal annealing of the as-synthesized ZnS(ethylenediamine) 0.5 nanosheets at different temperatures for different durations. The details of the synthesis processes have been reported elsewhere.…”

mentioning

confidence: 99%

Observations of unusual temperature dependent photoluminescence anti-quenching in two-dimensional nanosheets of ZnS/ZnO composites and polarization dependent photoluminescence enhancement in fungi-like ZnO nanostructures

Kole

Kumbhakar

Ganguly

2014

Journal of Applied Physics

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“…Since the nonlinear polarization-dependent optical properties are related to the anisotropy of the crystal. The field is maximum as the polarization parallel to the symmetry axis of the crystal [38]. The ZnO-MB grows along the c-axis, which coincides with the optical axis.…”

Section: Resultsmentioning

confidence: 96%

Enhanced third-harmonic generation via gold nanospheres localized surface plasmonic resonance

Wei¹,

Tang²,

Shen³

et al. 2022

J. Phys. D: Appl. Phys.

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In the progress of nanoengineering of noble metals, the extreme nonlinear optics within nanometric volumes is of great research interest in recent years. In particular, plasmonic nanostructures offer unique route for enhancing high-order harmonic generation and other nonlinear optical progress. Here, we report that strong third harmonic emission in zinc oxide (ZnO) microbelts via a strong localization of electromagnetic field caused by localized surface plasmon (LSP) resonances. In MB/Au-nanoparticles composite, it was demonstrated that the intensity of third-harmonic generation (THG) was enhanced by a factor of five compared to bare microbelt (MB). Additionally, the polarization characteristics of THG in the same system were illustrated in detail. With respect to the bare MB, the polarization degree of THG was improved significantly. The nonlinear polarization features can be attributed to the crystal structure and the ensemble of anisotropic plasmonic hot spots on the surface of Au nanoparticles. Finally, intrinsic enhancement process of THG was explored comprehensively by finite difference time domain (FDTD) method. The simulation results are consistent with our experimental observation.

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Luminescence enhancement in ZnO nanocrystals by polarized light

Cited by 15 publications

References 28 publications

Electrodeposition of Nanostructured ZnO Thin Films from Dimethylsulfoxide Solution: Effect of Temperatures on the Morphological and Optical Properties

Electrodeposition of Nanostructured ZnO Thin Films from Dimethylsulfoxide Solution: Effect of Temperatures on the Morphological and Optical Properties

Observations of unusual temperature dependent photoluminescence anti-quenching in two-dimensional nanosheets of ZnS/ZnO composites and polarization dependent photoluminescence enhancement in fungi-like ZnO nanostructures

Enhanced third-harmonic generation via gold nanospheres localized surface plasmonic resonance

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