Optical nonlinearities of Au nanocluster composite fabricated by 300keV ion implantation

Wang, Y.H.; Lu, Jian-Duo; Wang, R.W.; Peng, Shunjin; Mao, Yanli; Cheng, Yongguang

doi:10.1016/j.physb.2008.04.040

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Saturation behavior has also been observed in ion-implanted nanocomposites in different experiments that have been previously reported [26]. The same as in case, strong saturable absorption has been found in Ag and Au nanocomposites in the ps regime [27][28][29], and important applications of these effects have been proposed [30,31].…”

Section: Discussionsupporting

confidence: 74%

Ultrafast optical phase modulation with metallic nanoparticles in ion-implanted bilayer silica

et al. 2011

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The nonlinear optical response of metallic-nanoparticle-containing composites was studied with picosecond and femtosecond pulses. Two different types of nanocomposites were prepared by an ion-implantation process, one containing Au nanoparticles (NPs) and the other Ag NPs. In order to measure the optical nonlinearities, we used a picosecond self-diffraction experiment and the femtosecond time-resolved optical Kerr gate technique. In both cases, electronic polarization and saturated absorption were identified as the physical mechanisms responsible for the picosecond third-order nonlinear response for a near-resonant 532 nm excitation. In contrast, a purely electronic nonlinearity was detected at 830 nm with non-resonant 80 fs pulses. Regarding the nonlinear optical refractive behavior, the Au nanocomposite presented a self-defocusing effect, while the Ag one presented the opposite, that is, a self-focusing response. But, when evaluating the simultaneous contributions when the samples are tested as a multilayer sample (silica-Au NPs-silica-Ag NPs-silica), we were able to obtain optical phase modulation of ultra-short laser pulses, as a result of a significant optical Kerr effect present in these nanocomposites. This allowed us to implement an ultrafast all-optical phase modulator device by using a combination of two different metallic ion-implanted silica samples. This control of the optical phase is a consequence of the separate excitation of the nonlinear refracting phenomena exhibited by the separate Au and Ag nanocomposites.

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Section: Discussionsupporting

confidence: 74%

Ultrafast optical phase modulation with metallic nanoparticles in ion-implanted bilayer silica

et al. 2011

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“…The subwavelength confinement of light, allowing the control of light-matter interactions at the nanoscale, is one of the most powerful tools available for the development of new devices aimed to further fulfil Moore's law. In our case, the anisotropy of the nonlinear optical response [11][12][13], together with an as yet not totally exploited ion implantation method of fabrication [14][15][16], could make nonlinear optical components displaying long-range plasmonic waveguiding a reality in the near future [17]. Towards that goal, the study of the wavelength dependence of the nonlinear optical response can lead to the identification of a suitable spectral range for this kind of application.…”

Section: Introductionmentioning

confidence: 95%

On the physical contributions to the third-order nonlinear optical response in plasmonic nanocomposites

Fernández-Hernández¹,

Gleason-Villagran²,

Torres-Torres³

et al. 2012

J. Opt.

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Au and Ag isotropic and anisotropic nanocomposites were prepared using the ion implantation technique. Their optical properties were studied at several wavelengths in the optical range 300–800 nm, across their plasmon resonances. The linear regime was characterized by measuring the absorption spectrum and the third-order nonlinear regime by means of the Z-scan technique using a tunable picosecond pulsed laser system (26 ps). Open-aperture Z-scan traces show a superposition of different optical nonlinear absorption (NLA) processes in the whole range studied. We associate these phenomena with the excitation of inter- and intra-band electronic transitions, which contribute with a positive sign to NLA, and to the formation of hot-electrons, which contribute with opposite sign to NLA. Closed-aperture traces for measuring nonlinear refraction (NLR) show different signs for Au and Ag samples, and a change of sign in Au is found when purely inter-band transitions are excited. In this work, for the appropriate wavelength, it is worth remarking on the free-electron response to the exciting light and its strong contribution to the nonlinear optical properties for low (intra-band) and high (hot-electrons) irradiances.

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“…5(b) and 6(b) presented the normalized transmittances with close-aperture Z-scan measurements. If laser peak intensity was larger than a fixed value, glasses could be damaged during the Z-scan measurements due to accumulative heating [11]. In our experiments, the asymmetric closed-aperture Z-scan curve did not show significant change when we repeated the measurements at the same point, which indicated no damage happened in the samples during the Z-scan measurements.…”

Section: Methodsmentioning

confidence: 60%

“…It is well known that the appearance of the surface plasmon resonance (SPR) in the composite glasses with metal nanoclusters will induce an enhancement of linear and nonlinear responses [3][4][5][6], which leads to an increasing interest in the optical properties of metal-nanoparticle embedded glasses [7][8][9]. Recently, large third-/second-order nonlinearity of chalcohalide glasses and nanoparticle embedded silica-based glasses have been reported by Gao [10] and Wang [11,12], respectively. However, to our knowledge, there is few studying on the optical properties of chalcohalide glasses containing metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Third-order nonlinearity in Ag-nanoparticles embedded 56GeS2–24Ga2S3–20KBr chalcohalide glasses

Liu

Zhou

et al. 2011

Journal of Non-Crystalline Solids

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Optical nonlinearities of Au nanocluster composite fabricated by 300keV ion implantation

Cited by 8 publications

References 19 publications

Ultrafast optical phase modulation with metallic nanoparticles in ion-implanted bilayer silica

Ultrafast optical phase modulation with metallic nanoparticles in ion-implanted bilayer silica

On the physical contributions to the third-order nonlinear optical response in plasmonic nanocomposites

Third-order nonlinearity in Ag-nanoparticles embedded 56GeS2–24Ga2S3–20KBr chalcohalide glasses

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