Optical Limitation induced by Gold Clusters. 1. Size Effect

François, Lionel; Mostafavi, and Mehran; Belloni, J.; and, Jean-François Delouis; Delaire, Jacques A.; Feneyrou, Patrick

doi:10.1021/jp9944482

Cited by 220 publications

(124 citation statements)

References 13 publications

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“…7 Because of this, there are many interesting nonlinear optical properties of metal nanoparticles or nanorods that give immense enthusiasm for their use in applications such as optical limiting device, plasmon waveguide, sensor protection, medicine, and nanoprobes. [8][9][10][11] However, the saturable and reverse saturable absorption at longitudinal SPR in metal nanorods have not been explored and reported yet. In this letter, we report our investigations of resonant, saturable and reverse saturable absorption of longitudinal surface plasmons in gold nanorods (Au NRs).…”

mentioning

confidence: 99%

Observation of saturable and reverse-saturable absorption at longitudinal surface plasmon resonance in gold nanorods

Elim

Yang

Lee

et al. 2006

Applied Physics Letters

253

171

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Saturable and reverse saturable absorption at longitudinal surface plasmon resonance (SPR) in gold nanorods (Au NRs) have been observed using Z-scan and transient absorption techniques with femtosecond laser pulses. At lower excitation irradiances, the wavelength dispersion of saturable absorption has been determined near the longitudinal mode of SPR with a recovery time determined to be a few ten picoseconds on the SPR resonance. With higher excitation irradiances, reverse saturable absorption occurs and becomes dominant. The underlying mechanisms are discussed.Such reversible saturable absorption makes Au NRs an ideal candidate for optical limiting applications.

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mentioning

confidence: 99%

Observation of saturable and reverse-saturable absorption at longitudinal surface plasmon resonance in gold nanorods

Elim

Yang

Lee

et al. 2006

Applied Physics Letters

253

171

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“…The data for the SWNTs suspension recall the behavior of non-linear scattering systems, such as carbon black or gold clusters. 52 The hypothesis that the dominant mechanism of limitation is different for the suspension and for the solubilized NTs and that, particularly for the latter, there is a dominant excited state absorption, was already suggested by Sun and coworkers. 22 Further investigations are however needed to confirm the above hypothesis.…”

Section: Resultsmentioning

confidence: 95%

Shortened single-walled nanotubes functionalized with poly(ethylene glycol): preparation and properties

Menna¹,

Scorrano²,

Maggini³

et al. 2003

Arkivoc

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Poly(ethylene glycol) (PEG) was grafted to shortened single-walled carbon nanotubes (shSWNTs) obtained from original SWNTs after acid oxidative cutting and etching processes. PEGsh-SWNTs, prepared by treating the sh-SWNTs with SOCl 2 followed by amidation with PEGmonoamine (molecular weight = 2000), are moderately soluble in tetrahydrofuran, chlorinated hydrocarbons (ca. 1 mg/ml), sparingly soluble in water, acetone CH 3 OH and insoluble in non polar solvents such as toluene, hexanes or carbon disulfide. Non linear transmission measurements on solutions of PEG-sh-SWNTs in CHCl 3 showed a better optical limiting performance relative to that recorded for original SWNTs suspended in the same solvent.

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“…In solution metal nanoparticles can act as scattering centers due to microplasmas forming around them during a laser pulse [14,30]. Though in solid materials permanent damage is an expected problem [6].…”

Section: Nonlinear Scatteringmentioning

confidence: 99%

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Lundén¹

2017

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High power laser pulses can be a threat to sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that blocks radiation in chosen wavelength ranges. Colour filters' main drawback is that they block radiation regardless of it being useful or damaging, information is removed for wavelengths at which the filter protect. Protecting the entire wavelength range of a sensor would block or strongly attenuate the radiation needed for the operation of the sensor.Sol-gel glasses highly doped with Pt-Acetylide chromophores have previously shown high optical quality in combination with efficient optical power limiting through reverse saturable absorption 1 . These filters will transmit visible light unless the light fluence is above a certain threshold. A key design consideration of laser protection filters is linear absorption in relation to threshold level. By increasing chromophore concentration the threshold is lowered at the expense of higher linear absorption. This means that the user's view is degraded through the filter.Adding small amounts of gold nanoparticles to the glasses resulted in an increase in optical power limiting performance. The optimal concentration of gold nanoparticles corresponded to a mean particle distance of several micrometers. The work in this licentiate thesis is about the characterization and explanation of this effect.The glasses investigated in this work were MTEOS Sol-Gel glasses doped with either only gold nanoparticles of varying shape and concentration, 50 mM of PE2-CH 2 OH codoped with gold nanoparticles or 50 mM of PE3-CH 2 OH codoped with gold nanoparticles. The glasses only doped with gold nanoparticles showed high optical power limiting performance at 532 nm laser wavelength, but no optical power limiting at the fluences tested at 600 nm. The PE2-CH 2 OH glasses codoped with gold nanoparticles showed an enhancement of optical power limiting at 600 nm for the low gold nanoparticle concentration glasses. The enhancement was weak-1 Standard nomenclature, see section 1.3.3.iii iv ened or not present for higher concentrations. A similar enhancement above noise level for the PE3-CH 2 OH glasses was not found.A population model is used to give a qualitative explanation of the findings. The improvement in optical power limiting performance for the PE2-CH 2 OH glasses is explained by the gold nanoparticles helping to more quickly populate the highly absorbing triplet state during the rising edge of the laser pulse by enhancing two-photon absorption. The lack of any marked enhancement for the PE3-CH 2 OH glasses is explained by the PE3-CH 2 OH chromophore already being of sufficiently high performance to quickly populate the highly absorbing triplet state during the rising edge of the laser pulse. Further work is necessary to validate this model against other chromophores and improving its quantitative predictive power. Populärvetenskaplig sammanfattningLaserpulser med hög effekt kan vara ett hot mot sensorer, inklusive människoögat. Traditi...

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Optical Limitation induced by Gold Clusters. 1. Size Effect

Cited by 220 publications

References 13 publications

Observation of saturable and reverse-saturable absorption at longitudinal surface plasmon resonance in gold nanorods

Observation of saturable and reverse-saturable absorption at longitudinal surface plasmon resonance in gold nanorods

Shortened single-walled nanotubes functionalized with poly(ethylene glycol): preparation and properties

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

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