Efficient third-harmonic generation in a thin nanocrystalline film of ZnO

Petrov, Georgi I.; Shcheslavskiy, Vladislav I.; Yakovlev, V. V.; Ozerov, Igor; Chelnokov, E.; Marine, W.

doi:10.1063/1.1623948

Cited by 108 publications

(50 citation statements)

References 28 publications

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“…7,8 In addition, recently it has been observed that nanostructured ZnO thin film exhibits very high optical nonlinear properties. 9 Random laser effect is well studied experimentally in colloidal and microsized media. 10,11 But studies in case of nanostructured materials are not so well advanced because of lack of pure and size controlled ZnO nanocluster materials.…”

Section: Two-photon Pumped Random Laser In Nanocrystalline Znomentioning

confidence: 99%

Two-photon pumped random laser in nanocrystalline ZnO

Chelnokov

Bityurin

Ozerov

et al. 2006

Applied Physics Letters

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International audienceThin film of ZnO nanoparticles with dimension of about 5–10 nm were fabricated by the pulsed laser ablation method. By using a femtosecond laser beam at 700 nm to pump micrometer-thick films the authors observed two-photon-induced lasing at 385 nm. Experimentally obtained dependence of the threshold on the excitation spot radius r0 is closer to (1/r_0^2) than to (1/r_0), thus suggesting efficiency of the feedback by scattering-random lasing. The experimental data on nonlinear transmission of the film at the wavelength of pumping are presented

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Section: Two-photon Pumped Random Laser In Nanocrystalline Znomentioning

confidence: 99%

Two-photon pumped random laser in nanocrystalline ZnO

Chelnokov

Bityurin

Ozerov

et al. 2006

Applied Physics Letters

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“…ZnO thin films have been made by a variety of techniques, among which there can be mentioned reactive sputtering [6], spray pyrolysis [7], zinc oxidation [8], electro deposition [9], pulsed laser deposition [10], chemical vapor deposition (CVD) [11], metalorganic CVD (MOCVD) [12], plasma enhanced CVD (PECVD) [13], low pressure sputtering [14], chemical bath deposition (CBD) [15], and sol-gel route [16]. The sol-gel method has emerged as one of the most promising processing route as it is particularly efficient in producing thin, transparent, homogeneous, multi component oxide films of many compositions on various substrates at low cost * corresponding author; e-mail: lamia.znaidi@lspm.cnrs.fr and it allows the tuning of the refractive index and thickness of the film by varying synthesis parameters.…”

Section: Introductionmentioning

confidence: 99%

ZnO Thin Films Synthesized by Sol-Gel Process for Photonic Applications

et al. 2012

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Undoped and aluminum-doped ZnO thin films are prepared by the sol-gel process. Zinc acetate dihydrate, ethanol and monoethanolamine are used as precursor, solvent and stabilizer, respectively. In the case of Al-doped ZnO, aluminum nitrate nonahydrate is added to the precursor solution with an atomic percentage equal to 1 or 2 at.% Al. The multi thin layers are prepared by spin-coating onto glass substrates, and are transformed into ZnO upon annealing at 550• C. Films with preferential orientation along the c-axis are successfully obtained. The structural, morphological, and optical properties of the thin films as a function of aluminum content have been investigated for different elaboration parameters (e.g. layer number) using X-ray diffraction, atomic force microscopy, scanning electronic microscopy. Waveguiding properties of the thin films have been also studied using m-lines spectroscopy. The results indicate that our films are monomodes at 632.8 nm with propagation optical loss estimated around 1.6 dB/cm.

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“…ZnO from chemical bath deposition (CBD) at lower temperatures can be obtained with better uniformity on larger areas yet low efficiency photoluminescence (PL). The relationship between structure and nonlinear properties for complex nanomaterials, in particular third harmonic generation (THG) [2,3], is still less understood. The enhancement of THG in structured nanolayers was demonstrated to enable the complete characterization of ultrashort laser pulses at low dispersion and without the necessity of phase matching because of a crystal thickness well below the coherence length [4].…”

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THG of ZnO nanorods for efficient third order interferometric FROG

et al. 2014

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Efficient third harmonic generation was found in ZnO nanorod layers grown by phase transport and low temperature chemical bath deposition method. Interferometric frequencyresolved optical gating of few cycle fs pulses was demonstrated. OCIS codes: (160.4236) Nanomaterials; (190.4400) Nonlinear optics, materials; (190.7110) Ultrafast nonlinear optics.ZnO nanostructures are of increasing interest for optoelectronics, biomedicine, and other applications. Depending on the particular growth method, they appear in various nanomorphologies with specific physical and chemical properties [1]. High temperature vapour phase transport (VPT) yields material with excellent emission properties but is limited with respect to the substrate size. ZnO from chemical bath deposition (CBD) at lower temperatures can be obtained with better uniformity on larger areas yet low efficiency photoluminescence (PL). The relationship between structure and nonlinear properties for complex nanomaterials, in particular third harmonic generation (THG) [2,3], is still less understood. The enhancement of THG in structured nanolayers was demonstrated to enable the complete characterization of ultrashort laser pulses at low dispersion and without the necessity of phase matching because of a crystal thickness well below the coherence length [4].Here we report on the efficient generation of THG with different types of ZnO nanorods grown by both VPT and CBD and third order interferometric frequency-resolved optical gating (iFROG) [5]. ZnO nanorods of comparable geometry and size were grown by CBD and VPT on fused silica and (11-20) sapphire substrates, respectively [6]. The samples were characterized after deposition by field emission scanning electron microscopes (SEM) (JEOL JSM-6400F, Hitachi H-4100FE) and X-ray diffraction (XRD; Bruker AXS D8 Advance Texture Diffractometer). The SEM micrographs in Figs. 1 (a),(b) show the structure of the densely packed nanorod layers. For the frequency conversion experiments, a Ti:sapphire laser oscillator (VENTEON) was used (pulse duration 6-7 fs, center wavelength 810 nm, repetition rate 80 MHz, pulse energy > 5 nJ, spetral FWHM bandwidth > 300 nm). The beam waist in the focus was 4 µm, yielding a peak intensity of ~ 1.5 x 10 12 W/cm 2 of the un-attenuated beam. iFROG measurements were performed using a home-made Michelson interferometer (piezo: 35 nm steps). The THG signal was separated from residual pump radiation by a THG reflecting mirror and an interference filter. The light

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Efficient third-harmonic generation in a thin nanocrystalline film of ZnO

Cited by 108 publications

References 28 publications

Two-photon pumped random laser in nanocrystalline ZnO

Two-photon pumped random laser in nanocrystalline ZnO

ZnO Thin Films Synthesized by Sol-Gel Process for Photonic Applications

THG of ZnO nanorods for efficient third order interferometric FROG

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