Near-resonant second-order nonlinear susceptibility in <i>c</i>-axis oriented ZnO nanorods

Liu, Weiwei; Wang, Kai; Long, Hua; Chu, Sheng; Wang, Bing; Lu, Peixiang

doi:10.1063/1.4893599

Cited by 17 publications

(13 citation statements)

References 24 publications

(28 reference statements)

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“…Finally, inverted microscope configuration with a Ti: sapphire laser (780-810 nm) in reflection mode was employed to investigate ZnO nanorods array deposited onto Si substrate by CVD method, whit the c-axis perpendicular to the surface (diameters between 100 and 500 nm) [75]. The value of near-resonant d15 was measured to be 10.2 pm/V at 800 nm, far exceeding that measured, also in resonant condition, by Neumann et al (2.6 pm/V) [21].…”

Section: Shg From Zno Nanowires/nanorodsmentioning

confidence: 99%

Second harmonic generation from ZnO films and nanostructures

Larciprete¹,

Centini²

2015

Applied Physics Reviews

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Zinc oxide ZnO is a n-type semiconductor having a wide direct band gap (3.37 eV) as well as a\ud non-centrosymmetric crystal structure resulting from hexagonal wurtzite phase. Its wide transparency\ud range along with its second order nonlinear optical properties make it a promising material\ud for efficient second harmonic generation processes and nonlinear optical applications in general. In\ud this review, we present an extensive analysis of second harmonic generation from ZnO films and\ud nanostructures. The literature survey on ZnO films will include some significant features affecting\ud second harmonic generation efficiency, as crystalline structure, film thickness, surface contributes,\ud and doping. In a different section, the most prominent challenges in harmonic generation from ZnO\ud nanostructures are discussed, including ZnO nanowires, nanorods, and nanocrystals, to name a few.\ud Similarly, the most relevant works regarding third harmonic generation from ZnO films and nanostructures\ud are separately addressed. Finally, the conclusion part summarizes the current standing of\ud published values for the nonlinear optical coefficients and for ZnO films and nanostructures,\ud respectively

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Section: Shg From Zno Nanowires/nanorodsmentioning

confidence: 99%

Second harmonic generation from ZnO films and nanostructures

Larciprete¹,

Centini²

2015

Applied Physics Reviews

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“…In recent years, zinc oxide (ZnO) has emerged as a promising material for a large number of fundamental and applied fields due to its numerous interesting characteristics including direct wide band gap (3.37 eV) semiconductor with a large excitation binding energy (60 meV), material stability, high refractive indices, high values for second-and third-order nonlinear optical susceptibility tensors, and high internal quantum well efficiency [1][2][3][4]. These advantages place ZnO as an ideal candidate for several potential applications ranging from transparent conducting coatings [5] to flat panel displays (FPD) [6], solar cell windows [7], and photonic [8] and surface acoustic wave (SAW) devices [9], as well as for the realization of new generation of optoelectronic devices such as polariton lasers at room temperature [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Low Ag Doping on Physical and Optical Waveguide Properties of Highly Oriented Sol-Gel ZnO Thin Films

Dehimi

Touam

Chelouche

et al. 2015

Advances in Condensed Matter Physics

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A sol-gel dip-coating process was used to deposit almost stress-free highlyc-axis oriented zinc oxide (ZnO) thin films onto glass substrates. The effects of low silver doping concentration (Ag/Zn < 1%) on the structural, morphological, optical, and waveguide properties of such films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy, UV-Visible spectrophotometry, and M-lines spectroscopy (MLS). XRD analysis revealed that all the films were in single phase and had a hexagonal wurtzite structure. The grain size values were calculated and found to be about 24–29 nm. SEM micrographs and AFM images have shown that film morphology and surface roughness were influenced by Ag doping concentration. According to UV-Vis. measurements all the films were highly transparent with average visible transmission values ranging from 80% to 86%. It was found that the Ag contents lead to widening of the band gap. MLS measurements at 632.8 nm wavelength put into evidence that all thin film planar waveguides demonstrate a well-guided fundamental mode for both transverse electric and transverse magnetic polarized light. Moreover, the refractive index of ZnO thin films was found to increase by Ag doping levels.

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“…The measurements were made at an incident fundamental wavelength of 840 nm. A conversion efficiency of 1.1 × 10 −7 was obtained at about 4 µm above the base of the pyramid for a pump power of 24 mW compared to 1.4 × 10 −5 (at 21 mW) obtained from ZnO nanorods, [37] 1.8 × 10 −9 (at 3 mW) from Au-coated silica nanoparticles, [38] and 2.4 × 10 −9 (7 mW) for a GaN 2D photonic www.advopticalmat.de Figure 6b depicts the efficiency of the SHG process, η, as a function of the incident pump power.…”

Section: Wwwadvopticalmatdementioning

confidence: 84%

Hyperspectral Nonlinear Optical Light Generation from a Monolithic GaN Microcavity

Butler

Jiang

Jun

et al. 2017

Advanced Optical Materials

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Localized spatial excitation of a single hexagonal GaN micropyramid with (1 101) facets formed by selective area growth is optimized for nonlinear optical light (NLO) generation due to second harmonic generation (SHG) and multiphoton luminescence (MPL). Multiphoton transition induced ultraviolet and yellow luminescence is observed for excitations above and below half bandgap energy. SHG and MPL observed for excitations below half the bandgap energy are superimposed to realize broadband emission in the UV-visible range. The light generation is optimized by controlling the cavity modes formed by the hexagonal facets and the tip enhanced effects from the pyramid. The MPL is optimum at the apex of the pyramid. The SHG is most efficient within the pyramid (≈4 µm above the base) due to the formation of spatially stable cavity modes within the cavity. The NLO interactions within the pyramid are optimized to realize microphotonic white light sources and coherent tunable UV-visible sources using spatially controlled excitation without any change in material parameters. At the bandgap of GaN, the resonant two-photon emission dominates the nonlinear light generation process compared to the coherent SHG light generated within the cavity.

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

Cited by 17 publications

References 24 publications

Second harmonic generation from ZnO films and nanostructures

Second harmonic generation from ZnO films and nanostructures

Effects of Low Ag Doping on Physical and Optical Waveguide Properties of Highly Oriented Sol-Gel ZnO Thin Films

Hyperspectral Nonlinear Optical Light Generation from a Monolithic GaN Microcavity

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