Nonlinear optical properties of organic and polymeric materials
29 Sep 1983-
About: The article was published on 1983-09-29 and is currently open access. It has received 762 citations till now.
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TL;DR: An organic centric compound Piperazinium trichloroacetate (PPTC) was successfully synthesized and grown first time from water solvent by applying slow evaporation technique as discussed by the authors.
13 citations
TL;DR: In this article, the authors performed transient grating experiments on a 5μm-thick polystyrene film doped with naphthalene and on a 700μm−thick pure poly styrene film at room temperature.
Abstract: Picosecond transient grating experiments have been performed on a 5‐μm‐thick polystyrene film doped with naphthalene and on a 700‐μm‐thick pure polystyrene film at room temperature. In both cases, the observed acoustic modulation of the diffracted signal is explained by the formation of a thermal grating. No detectable acoustic attenuation is observed within the time delay of 6 ns, and the speed of sound obtained from the acoustic modulation period is in excellent agreement with that reported by an ultrasonic measurement. The coherent third order nonlinear electronic response observed at zero‐time delay is found to be shorter than 2 ps.
13 citations
TL;DR: Two new di-cationic imidazolium based ionic liquids (ILs) containing chloride or hexafluorophosphate anions (bisImCl and bisImPF6) have been synthesized and characterized by FT-Raman and 1H- and 13C NMR spectroscopies.
13 citations
Cites background from "Nonlinear optical properties of org..."
...It is also reported that change of the refractive index can induce variations of the heat conduction process, which is directly related to the nonlocal character of the optical nonlinearity [20]....
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29 Jul 1997
TL;DR: In this paper, the authors trace the hierarchical lineage that connects molecular hybridization (chemical functionality), through supramolecular hybridisation (collective properties and responses), to functional hybridization(device and system level constructs), thread their way through discussions of the roles sol-gel glasses might be anticipated to assume in a photonics marketplace.
Abstract: This paper examines sol-gel materials for photonics in terms of partnerships with other material contenders for processing optical devices. The discussion in four sections identifies semiconductors, amorphous and crystalline inorganic dielectrics, and amorphous and crystalline organic dielectrics as strategic agents in the rapidly evolving area of materials and devices for data communications and telecommunications. With Zyss, we trace the hierarchical lineage that connects molecular hybridization (chemical functionality), through supramolecular hybridization (collective properties and responses), to functional hybridization (device and system level constructs). These three concepts thread their way through discussions of the roles sol-gel glasses might be anticipated to assume in a photonics marketplace. We assign a special place to glass integrated optics and show how high temperature consolidated sol-gel derived glasses fit into competitive glass fabrication technologies. Low temperature hybrid sol-gel glasses that combine attractive features of organic polymers and inorganic glasses are considered by drawing on examples of our own new processes for fabricating couplers, power splitters, waveguides and gratings by combining chemical synthesis and sol-gel processing with simple photomask techniques.
12 citations
TL;DR: In this paper, the third harmonic generation (THG) was used to probe the nonlinear susceptibility (χ(3)) of polyacetylene, and the results were consistent with calculations of χ||(3) based on virtual generation of solitons enabled by nonlinear zero point fluctuations (instantons).
Abstract: Third harmonic generation (THG) is used to probe the nonlinear susceptibility (χ(3)) of polyacetylene. The magnitude of χ||(3) (3ω; ω, ω, ω) is (4 ± 2) × 10-10 esu with ω = 1.17 eV; the only important component is that associated with π-electron motion along the backbone. Comparison of THG in cis- and trans-(CH)x shows that χ||(3)|trans is 15–20 times larger, implying a mechanism sensitive to the existence of a degenerate ground state. The results are consistent with calculations of χ||(3) based on virtual generation of solitons enabled by nonlinear zero point fluctuations (instantons).
12 citations