Ultrafast Intense Probes of Nonlinear Optical Material Interactions

Moloney, Jerome V.

doi:10.1007/978-1-4612-1714-5_7

Cited by 9 publications

(25 citation statements)

References 12 publications

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“…( 1), (3), and ( 4) and it can be seen in Table I. The corresponding Imv (3) values in the case of the 2.0 mM solutions have been found to be 0.224 Â 10 À13 esu and 0.471 Â 10 À13 esu for the systems Au-P and Au-Mel, respectively. As it can be seen from Table I, the Au-Mel system exhibits higher nonlinear refraction and nonlinear absorption, which results in a much higher hyperpolarizability c (by about a factor of 2.5), compared with the Au-P complex.…”

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confidence: 78%

“…[http://dx.doi.org/10.1063/1.4772476] Nonlinear optical (NLO) materials are widely investigated as promising candidates for a variety of applications such as optical communications, optical storage, optical computing, harmonic light generation, optical power limiting, optical rectifying devices, displays, printers, dynamic holography, frequency mixing, and optical switching [1][2][3] for which large second order and/or third order nonlinear optical responses are a prerequisite. In the search for efficient NLO molecular systems, [4][5][6][7] dithiolene metal complexes have been widely investigated.…”

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confidence: 99%

“…The NLO measurements were done employing the Z-scan technique, 17 utilizing a diode pumped passively mode-locked Nd:YVO 4 laser with a repetition rate of 10 Hz delivering 30 ps laser pulses at 532 nm. By means of this setup, the real (related with nonlinear refraction) and imaginary (related with nonlinear absorption) parts of the third order nonlinear susceptibility (v (3) ), as well as their signs, have been separately determined.…”

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confidence: 99%

“…The "open aperture" Z-scans of the samples having concentrations 1.5-2.0 mM have been found to exhibit transmittance minima characteristic of the reverse saturable absorption (RSA) character, while for lower concentrations the nonlinear absorption has been found to be negligible. Moreover, the "divided" Z-scans exhibited valley-peak configuration indicative of self-focusing action of the materials, while the contribution of the solvent has in all cases measured and removed in order to determine the Rev (3) of the systems. Characteristic "divided" and "open aperture" Z-scans can be seen in Figure 2 corresponding to an AuM solution in DMF (2.0 mM).…”

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confidence: 99%

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Effect of the counter cation on the third order nonlinearity in anionic Au dithiolene complexes

Iliopoulos

El‐Ghayoury

Derkowska

et al. 2012

Applied Physics Letters

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In this work, we present the third order nonlinear optical investigation of two gold complexes, which differ by the nature of the counter cations. The impact of the different design in the architecture through a set of hydrogen bonds in the case of Au-Mel of the systems on the nonlinearity has been studied by means of the Z-scan setup under 532 nm, 30 ps laser excitation, allowing for the determination of the nonlinear absorption and refraction of the samples. Significant modification of the nonlinear optical response between the two metal complexes has been found suggesting a clear effect of the counter cation.

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confidence: 78%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Effect of the counter cation on the third order nonlinearity in anionic Au dithiolene complexes

Iliopoulos

El‐Ghayoury

Derkowska

et al. 2012

Applied Physics Letters

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“…Some of the exotic and unconventional effects found are high temperature superconductivity (Bednorz and Müller (1986)), Kondo effect (Kondo (1964);Wilson (1975)), giant magneto resistance (Baibich et al (1988); Grünberg et al (1986)), very large linear and non-linear optical responses (Moloney (1998)), large thermopower (Shastry (2013)) and giant volume collapse (Allen and Martin (1982)). These effects are as a result of interplay of spin, orbital, charge and other degrees of freedom, which is very common in these materials.…”

Section: Background 21 Strong Correlationsmentioning

confidence: 99%

Mo3S7(dmit)3: from material to models

Chander¹

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Strongly correlated systems belong to a class of materials in which electron correlations play an important role. Correlated systems display many unconventional behaviours like high temperature superconductivity, fractionalised excitations, extremely fast non-linear optical responses and many more exotic properties. Thus strong correlated materials exhibit many interesting physics which have potential applications in a wide range of areas.In this Thesis, we explore the numerical simulation of a strongly correlated quasi one dimensional organic material Mo 3 S 7 (dmit) 3 . The Haldane phase is a symmetry-protected-topologically-ordered phase with edge states and a non-local string order. In our simulation using matrix products states, we see all these signatures, in addition to the double degeneracy in the entanglement spectrum that characterizes the Haldane phase. We find that the Haldane phase is robust despite the charge fluctuations in the model and the parity (inversion) symmetry protects the Haldane phase in fermionic models.The final part of the thesis deals with finding the tight-binding hopping integrals of Mo 3 S 7 (dmit) 3 using density functional theory. We make an unitary transformation of Kohn-Sham orbitals obtained using DFT to Wannier orbitals. Using the overlap of Wannier orbitals in the real space, we find the magnitude of tight-binding integrals. From these tight-binding integrals we arrive at low energy effective models that describe the material Mo 3 S 7 (dmit) 3 .ii

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Thermoset polymers as host for optical limiting

Caillieaudeaux,

Muller,

Guerchoux

et al. 2023

J of Applied Polymer Sci

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The human eye, sensors, and photoreceptors can be damaged if they are submitted to laser beams with high intensities and low divergence. In the military field, an optical sensor can be damaged by pulsed laser radiations when exposed beyond its capacities. In order to have a protection against such threats, passive optical limiting is used. A mix between a reactive oligomer and a monomer, with methacrylate functions, is studied in the present work giving a thermoset matrix. To prevent the monomer evaporation, which results in the formation of bubbles in the final material, related to the reaction exotherm, an oligomer and a monomer with a high boiling temperature are used as precursors, giving a good alternative to a thermoplastic matrix like polymethyl methacrylate (PMMA). We report the experimental results of transient thermally induced optical nonlinearities (i.e., nonlinear refraction) in methacrylate‐based polymer filters at a nanosecond timescale, focus will be made to compare third order nonlinear refractive index from thermally induced refractive index. Optical filters are obtained by chemical bulk processes. In the present work, both thermoplastics and thermosets matrices were synthesized in order to characterize their optical limiting properties by mean of an appropriate custom‐made optical setup as well as their nonlinear refractive indices measured by the z‐scan technique. Optical measurements in the nonlinear regime are achieved at the wavelength of 1064 nm. To the best of the authors’ knowledge, such a work dealing on 3D‐network methacrylate‐based host has never been published.

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Ultrafast Intense Probes of Nonlinear Optical Material Interactions

Cited by 9 publications

References 12 publications

Effect of the counter cation on the third order nonlinearity in anionic Au dithiolene complexes

Effect of the counter cation on the third order nonlinearity in anionic Au dithiolene complexes

Mo3S7(dmit)3: from material to models

Thermoset polymers as host for optical limiting

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