Toward Highly Oriented Conjugated Polymers for Non-Linear Optics

1987 ◽  
Vol 109 ◽  
Author(s):  
P. Smith ◽  
A. J. Heeger ◽  
F. Wudl ◽  
J. Chiang
Keyword(s):  
Conjugated Polymers ◽  
Conjugated Polymer ◽  
Nonlinear Response ◽  
Fast Response ◽  
Optical Quality ◽  
Linear Optics ◽  
Third Order ◽  
Third Harmonic ◽  
Non Linear Optics ◽  
Order Susceptibility

The promise of conjugated polymers as fast response nonlinear optical materials has been emphasized, since the nonresonant third order nonlinear susceptibilities of these π-electron polymers are among the largest measured in any material. For example, third harmonic generation (THG) experiments have shown that for trans-polyacetylene, χ║(3)(3ω:ωω,ω) = (4± 2) × 10-10 esu, where χ║(3) refers to that component of the third order susceptibility tensor with all indices parallel to the chain direction [1]. The large nonlinear response is anisotropic and arises from the π-electrons of the conjugated polymer. The magnitude and anisotropy are comparable to results obtained from single crystals of polydiacetylene-(toluenesulfonate). Given these large χ║(3) values, it is important to develop methods for fabricating chain-aligned (oriented) conjugated polymer films which have optical quality.

scholarly journals A Unified Mathematical Formalism for First to Third Order Dielectric Response of Matter: Application to Surface-Specific Two-Colour Vibrational Optical Spectroscopy

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 153 ◽  
Author(s):  
Christophe Humbert ◽  
Thomas Noblet
Keyword(s):  
Dielectric Response ◽  
Structure And Properties ◽  
Linear Optics ◽  
Third Order ◽  
Mathematical Functions ◽  
Sum Frequency ◽  
Non Linear Optics ◽  
Non Linear ◽  
Light Excitation

To take advantage of the singular properties of matter, as well as to characterize it, we need to interact with it. The role of optical spectroscopies is to enable us to demonstrate the existence of physical objects by observing their response to light excitation. The ability of spectroscopy to reveal the structure and properties of matter then relies on mathematical functions called optical (or dielectric) response functions. Technically, these are tensor Green’s functions, and not scalar functions. The complexity of this tensor formalism sometimes leads to confusion within some articles and books. Here, we do clarify this formalism by introducing the physical foundations of linear and non-linear spectroscopies as simple and rigorous as possible. We dwell on both the mathematical and experimental aspects, examining extinction, infrared, Raman and sum-frequency generation spectroscopies. In this review, we thus give a personal presentation with the aim of offering the reader a coherent vision of linear and non-linear optics, and to remove the ambiguities that we have encountered in reference books and articles.

Averaged third-order susceptibility of ZnO nanocrystals from Third Harmonic Generation and Third Harmonic Scattering

2018 ◽  
Vol 84 ◽  
pp. 579-585 ◽  
Author(s):  
V.V. Multian ◽  
J. Riporto ◽  
M. Urbain ◽  
Y. Mugnier ◽  
G. Djanta ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Order ◽  
Third Harmonic ◽  
Zno Nanocrystals ◽  
Order Susceptibility

Enhancement of Optical Third Order Nonlinearity in Main-Chain Oriented Polythiophenes

1991 ◽  
Vol 244 ◽  
Author(s):  
Haruki Okawa ◽  
Tatsuo Wada ◽  
Hiroyuki Sasabe
Keyword(s):  
Conjugated Polymers ◽  
Main Chain ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Polymer Backbone ◽  
Third Harmonic ◽  
One Dimensional ◽  
Nonlinear Responses ◽  
Large Enhancement ◽  
Third Order Nonlinear Susceptibility

ABSTRACTThe third order nonlinear responses for soluble one-dimensional ϕ-conjugated polymers, poly(3-alkylthiophene)s were investigated. Uniaxial stretching of the polymer film was carried out to align the polymer backbone. The stretched film showed large dichroism and crystallinity. Third order nonlinear susceptibility, χ(3)1111 of the stretched film was determined by optical third harmonic generation. A large enhancement of χ(3) due to the main chain alignment was observed.

Measurement of the third order susceptibility of -polyacetylene by third harmonic generation

1987 ◽  
Vol 61 (4) ◽  
pp. 221-225 ◽  
Author(s):  
M. Sinclair ◽  
D. Moses ◽  
A.J. Heeger ◽  
K. Vilhelmsson ◽  
B. Valk ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
Order Susceptibility

scholarly journals Third-order nonlinear response of conjugated polymer coated carbon nanotubes

2006 ◽  
Vol 55 (7) ◽  
pp. 3736
Author(s):  
Yi Wen-Hui ◽  
Xu You-Long ◽  
Feng Wei ◽  
Wu Hong-Cai ◽  
Gao Chao
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymer ◽  
Nonlinear Response ◽  
Third Order ◽  
Coated Carbon

Sol-Gel Processed Inorganic and Organically Modified Composites for Nonlinear Optics and Photonics

1990 ◽  
Vol 180 ◽  
Author(s):  
Paras N. Prasad
Keyword(s):  
Nonlinear Optics ◽  
Conjugated Polymer ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Composite Films ◽  
Optical Quality ◽  
Optical Recording ◽  
Third Order ◽  
Organically Modified ◽  
Optical Waveguiding

ABSTRACTThe newly emerging field of Nonlinear Optics and Photonics offers tremendous opportunities for material scientists. In this paper, chemical processing using the sol-gel method is described for the preparation of new composite materials of both a silica glass and a V2O5 gel with a wπ conjugated polymer poly-p-phenylene vinylene up to 5d% by weight. The composite films show highly improved optical quality with large third-order nonlinear optical coefficients, the latter from the conjugated polymer. Optical waveguiding through the film has been achieved. Nonlinear optical studies using femtosecond degenerate four wave mixing and power dependent waveguide coupling have been successfully performed. Also, to investigate the use of such films for optical recording, a two-dimensional grating structure has successfully been produced.

Organometallic Complexes for Non-linear Optics. 49.* Third-Order Non-linear Optical Spectral Dependence Studies of Arylalkynylruthenium Dendrimers

2011 ◽  
Vol 64 (9) ◽  
pp. 1269 ◽  
Author(s):  
Marek Samoc ◽  
T. Christopher Corkery ◽  
Andrew M. McDonagh ◽  
Marie P. Cifuentes ◽  
Mark G. Humphrey
Keyword(s):  
Spectral Dependence ◽  
Organometallic Complexes ◽  
Photon Absorption ◽  
Linear Optics ◽  
Third Order ◽  
Short Wavelength Range ◽  
Two Photon Absorption ◽  
Non Linear Optics ◽  
Two Photon ◽  
Non Linear

The cubic hyperpolarizabilities of 1,3,5-(trans-[RuCl(dppe)2(C≡CC6H4-4-C≡C)])3C6H3 (1), 1,3,5-(trans-[Ru(C≡CPh)(dppe)2(C≡CC6H4-4-C≡C)])3C6H3 (2), 1,3,5-(trans-[Ru(C≡CC6H4-4-NO2)(dppe)2(C≡CC6H4-4-C≡C)])3C6H3 (3), 1,3,5-{trans-[Ru(C≡C-3,5-(trans-[Ru(C≡CPh)(dppe)2(C≡CC6H4-4-C≡C)])2C6H3)(dppe)2(C≡CC6H4-4-C≡C)]}3C6H3 (4), and 1,3,5-{trans-[Ru(C≡C-3,5-(trans-[Ru(C≡CC6H4-4-NO2)(dppe)2(C≡CC6H4-4-C≡C)])2C6H3)(dppe)2(C≡CC6H4-4-C≡C)]}3C6H3 (5) have been assessed over the spectral range 520–1600 nm using the Z-scan technique and ~150 fs pulses. All complexes exhibit negative values of γreal (corresponding to self-defocusing behaviour) and significant positive values of γimag (corresponding to two-photon absorption) at short wavelengths (up to 1000 nm). The maximal values of γreal and γimag increase in magnitude on dendrimer generation increase (proceeding from 2 to 4 or 3 to 5). The open-aperture Z-scan results have been used to confirm and contrast the two-photon (2PA) and three-photon absorption (3PA) behaviour of 1–5, the data being consistent with the existence of 2PA at the short wavelength range, but with significant 3PA at longer wavelengths for 1–3 and 5, a record 3PA coefficient for an inorganic complex for 5 at 1180 nm, and appreciable 3PA at the telecommunications wavelength of 1300 nm.

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