Mechanisms for fabrications and nonlinear optical properties of Pd and Pt nanoparticles by femtosecond laser

Fan, Gao-Chao; Ren, Shoutian; Qu, Shiliang; Guo, Zhongyi; Wang, Qiang; Wang, Yanshen; Gao, Ruifeng

doi:10.1016/j.optcom.2013.01.018

Cited by 27 publications

(21 citation statements)

References 39 publications

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“…This phenomenon is also noteworthy for Pt NPs suspensions at varied wavelengths, e.g., at 792 nm of 120 fs, 1064 nm of 50 ps, and 800 nm with femtosecond pules . In regard of narrow interval band structure of Pt NPs as discussed above, Fan and his co‐workers interpreted the underlying mechanism for prominent saturable absorption as interband electron transition by monophoton absorption . Besides, they inferred that the origin of the self‐focusing refraction is through the electronic mechanisms of hot electrons arising from the strong nonlinear absorption .…”

Section: Resultsmentioning

confidence: 69%

“…It is worth noting that the glass dispersed with Pt NPs behaves stronger with nonlinear absorption (Im χ (3) = −2.23 × 10 −10 esu) comparing with nonlinear refraction (Re χ (3) = 1.23 × 10 −11 esu) in magnitude. This phenomenon is also noteworthy for Pt NPs suspensions at varied wavelengths, e.g., at 792 nm of 120 fs, 1064 nm of 50 ps, and 800 nm with femtosecond pules . In regard of narrow interval band structure of Pt NPs as discussed above, Fan and his co‐workers interpreted the underlying mechanism for prominent saturable absorption as interband electron transition by monophoton absorption .…”

Section: Resultsmentioning

confidence: 88%

“…Although the evidence from theory and experimental data demonstrates that Pt NPs with large size have possibility of SPR phenomenon in ultraviolet region, the observed absorption cannot be attributed to SPR effect as the size of entrapped Pt NPs is not large enough. For fcc metal of Pt, transition occurs merely around the L point of Brillouin Zone where d band with wide bandwidth is rather close to s–p band and even exists an insertion of s–p band into d band probably, leading to easy interband transition . Therefore, the increased absorption toward ultraviolet wavelength range of silica glass dispersed with Pt NPs possibly originates from interband electron transition of Pt NPs.…”

Section: Resultsmentioning

confidence: 99%

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Solid‐State Sintering of Glasses with Optical Nonlinearity from Mesoporous Powders

Zhang

Zhou

et al. 2016

J. Am. Ceram. Soc.

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Silica glasses dispersed with Pt nanoparticles and Ag nanoparticles are derived from solid‐state sintering of mesoporous silica SBA‐15 encapsulated with Pt nanoparticles and Ag nanoparticles, respectively. Using mesoporous powders for sintering is a facile method to lower synthesis temperature for glass making and to efficiently disperse noble metal nanoparticles in silica glass matrix. The included nanoparticles still play their functional roles in impacting on optical properties of the glass products prepared by this novel method. The glass dispersed with Pt nanoparticles exhibits brown color due to the interband electron transition of Pt nanoparticles. The coloring effect of surface plasmon resonance absorption from Ag nanoparticles colors the glass dispersed with Ag nanoparticles with yellow. Open‐aperture and closed‐aperture Z‐scan methods are applied to measure third‐order nonlinear absorption and refraction coefficient of the composite glasses, respectively, under femtosecond laser radiation at 880 nm wavelength. The glass dispersed with Pt nanoparticles behaves intense nonlinear absorption comparing with nonlinear refraction in magnitude, which could be attributed to interband electron transition by monophoton absorption of Pt nanoparticles. The glass dispersed with Ag nanoparticles shows stronger nonlinear refraction than saturated absorption. The dominant contribution to third‐order optical nonlinearity of silica glass dispersed with Ag nanoparticles is intraband transition of free electrons near the Fermi surface of Ag nanoparticles. This method may have potential applications for fabricating silica glasses dispersed with ultrafine functional particles, which are potentially applicative in the fields of photonics.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Solid‐State Sintering of Glasses with Optical Nonlinearity from Mesoporous Powders

Zhang

Zhou

et al. 2016

J. Am. Ceram. Soc.

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“…Furthermore, we can calculate the real and imaginary parts of the third-order nonlinear susceptibility (χ (3) ) of the film samples by equations (1) and (2) 31 ,where n 0 , c, ε 0 and λ are linear refractive index, speed of light, permittivity of free space and the wavelength of the laser light of the film sample, respectively. The total third-order nonlinear susceptibility χ (3) can be calculated by equation (3).…”

Section: Resultsmentioning

confidence: 99%

Moderate fabrication and characterization of the microcrystalline Sr2CuO3 glass films with effective nonlinearities

Jiang

et al. 2018

Sci Rep

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Since nonlinear optical materials used in the ultrafast all-optical switching is an important part for the modern optical technology, cuprates have been widely investigated for their specific Cu-O chain structure and intriguing optical properties. We present a new preparation method of microcrystalline Sr2CuO3 glass films on glass substrates combining spin-coating and co-sintering techniques. Then, the as-prepared samples were polished for different times to obtain microcrystalline Sr2CuO3 glass films with varying thickness. The influence of polishing time on the structure, the valence state and the nonlinear optical response were discussed, respectively. The purity of the Sr2CuO3 phase, surface morphology and the chemical composites of these synthesized glass films were given with scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Importantly, optical absorption spectroscopy and Z-scan technique were used to measure linear absorption and third-order optical nonlinearity of the films. The experiments showed that third-order nonlinear susceptibility of the 140 min polished film sample with a thickness of 18 μm was up to 1.23 × 10−12 esu, indicating its potential application in the nonlinear field.

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“…The calculated β and γ values are applied to deduce the real and imaginary part of the third-order nonlinear susceptibility according to Eqs. (6) and (7) [53].…”

Section: Nonlinear Optical Properties Studiesmentioning

confidence: 99%

Sol-gel synthesis and third-order optical nonlinearity of Au nanoparticles doped monolithic glass

Gao

Xiang

et al. 2015

Gold Bull

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Gold nanoparticles (Au NPs) doped monolithic and transparent sodium borosilicate glass has been synthesized by both sol-gel and atmosphere control heat treatment methods. Fourier transform infrared (FTIR) spectra in the wavenumber range of 400 to 4000 cm −1 were applied to collect variation information of surface groups of the samples in the sintering process. The microstructure of Au NPs in the glass was characterized by means of X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). Meanwhile, the linear optical properties of the glass were analyzed by UV-vis spectrometer between the wavelength of 300 and 1000 nm, and a broad absorption band around 600 nm was observed. The third-order nonlinear optical properties of the glass were investigated by using Z-scan technique at the wavelength of 800 nm, pulse duration of 190 fs, and repetition rate of 20 Hz. The glass showed saturable absorption and self-focusing nonlinear refraction, and the optical nonlinear susceptibility χ (3) was estimated to be 1.7 × 10 −14 esu, with the single-pulse energy of 1 μJ.

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Mechanisms for fabrications and nonlinear optical properties of Pd and Pt nanoparticles by femtosecond laser

Cited by 27 publications

References 39 publications

Solid‐State Sintering of Glasses with Optical Nonlinearity from Mesoporous Powders

Solid‐State Sintering of Glasses with Optical Nonlinearity from Mesoporous Powders

Moderate fabrication and characterization of the microcrystalline Sr2CuO3 glass films with effective nonlinearities

Sol-gel synthesis and third-order optical nonlinearity of Au nanoparticles doped monolithic glass

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