Second harmonic generation from LB superlattices containing two active components

Neal, D. B.; Petty, Michael C.; Roberts, G.G.; Ahmad, M.M.; Feast, W. James; Girling, I.R.; Cade, N.A.; Kolinsky, P.V.; Peterson, I. R.

doi:10.1049/el:19860313

Cited by 97 publications

(14 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experiments with alternation of fatty acid molecules that are inactive in terms of optics proved to be ineffective in contrast to expectations. In this regard, Neal 25 proposed a different method of alternation of layers, where hemicyanine and aminonitrostilbene dyes were used, whose hyperpolarizabilities are opposite in sign. Thus, despite the fact that the deposition was performed by Y-type, the values of hyperpolarizabilities were added.…”

Section: Structurally Organized Materialsmentioning

confidence: 99%

Metal–organic frameworks as competitive materials for non-linear optics

et al. 2016

View full text Add to dashboard Cite

The last five years have witnessed a huge breakthrough in the creation and the study of the properties of a new class of compounds - metamaterials. The next stage of this technological revolution will be the development of active, controllable, and non-linear metamaterials, surpassing natural media as platforms for optical data processing and quantum information applications. However, scientists are constantly faced with the need to find new methods that can ensure the formation of quantum and non-linear metamaterials with higher resolution. One such method of producing metamaterials in the future, which will provide scalability and availability, is chemical synthesis. Meanwhile, the chemical synthesis of organized 3D structures with a period of a few nanometers and a size of up to a few millimeters is not an easy task and is yet to be resolved. The most promising avenue seems to be the use of highly porous structures based on metal-organic frameworks that have demonstrated their unique properties in the field of non-linear optics (NLO) over the past three years. Thus, the aim of this review is to examine current progress and the possibilities of using metal-organic frameworks in the field of non-linear optics as chemically obtained metamaterials of the future. The review begins by presenting the theoretical principles of physical phenomena represented by mathematical descriptions for clarity. Major attention is paid to the second harmonic generation (SHG) effect. In this section we compare inorganic single crystals, which are most commonly used to study the effect in question, to organic materials, which also possess the required properties. Based on these data, we present a rationale for the possibility of studying the non-linear optical properties of metal-organic structures as well as describing the use of synthetic approaches and the difficulties associated with them. The second part of the review explicitly acquaints the reader with a new class of materials which successfully combines the positive properties of organic and inorganic materials. Using recently synthesized metal-organic frameworks and coordination polymers in the field of non-linear optics as an example, we consider synthetic approaches used for obtaining materials with desired properties and the factors to be considered in this case. Finally, probable trends towards improving the quality of the synthesized materials with regards to their further use in the field of non-linear optical effects are described.

show abstract

Section: Structurally Organized Materialsmentioning

confidence: 99%

Metal–organic frameworks as competitive materials for non-linear optics

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Second-harmonic generation (SHG) from monolayers of highly polarizable dyes was reported for the first time by Aktsipetrov et al, xb the corresponding x (2) being of the order of that of LiNb03-SHG has been demonstrated in monolayers of merocyanine, 16 hemicyanines, 17 amidonitrostilbenes, 18 and azobenzene derivatives. 19 Z-type [19][20][21] and Ytype alternated multilayers 18 ' 22,23 have been studied; the corresponding SH signals increase with the number of active 20 quadratic, 19 or superquadratic 21 dependence, depending on the structure and the deposition conditions of the samples.…”

Section: _4mentioning

confidence: 99%

“…19 Z-type [19][20][21] and Ytype alternated multilayers 18 ' 22,23 have been studied; the corresponding SH signals increase with the number of active 20 quadratic, 19 or superquadratic 21 dependence, depending on the structure and the deposition conditions of the samples. Linear electro-optic effects of a monolayer of hemicyanine have also been demonstrated.…”

Section: _4mentioning

confidence: 99%

Second-harmonic generation in Langmuir–Blodgett monolayers of stilbazium salt and phenylhydrazone dyes

Lupo¹,

Praß

Scheunemann³

et al. 1988

J. Opt. Soc. Am. B

155

View full text Add to dashboard Cite

show abstract

“…The local field factors 1, i = 1, 2 take into account the difference between the applied field and the field acting on the molecule at the fundamental (i = 1) and second harmonic (i = 2) frequency. The molecular hyperpolarizability in the macroscopic frame bilK is related to B, the only significant element of the molecular hyperpolarizability tensor for molecules with a para-substituted, extended, conjugated it-electron system, through b = <cos3®>B22, (2) and b = (l/2)<cosesin2e>B22, (3) where 9 represents the tilt angle between the molecular chromophore axis and the normal to the plane of the film. The brackets <> represent averages over the distribution of tilt angles (B in the LB film.…”

Section: Nonlinear Optics In Langmuir-blodgett Filmsmentioning

confidence: 99%

<title>Phase-matched second-harmonic generation in waveguides of polymeric Langmuir-Blodgett films</title>

et al. 1993

View full text Add to dashboard Cite

Langmuir-Blodgett (LB) films have been fabricated from a preformed acrylate amphiphilic copolymer with nonlinear optical (NLO) active chromophores covalently attached to the polymer backbone. By alternate deposition of this NLO active polymer with an NLO passive amphiphilic polymer, high quality multilayer films have been obtained with sufficient thickness to allow waveguiding in the LB films. The observed optical attenuation is between 1 and 3 dB ciii'. The linear and nonlinear optical characteristics of these films have been determined, both in transmission (or reflection) and in waveguide format. The high degree of order in LB films makes this type of supramolecular structure attractive for NLO applications. Based on the observed parameters (dispersion of the refractive indices, birefringence, tilt angle of the chromophore, hyperpolarizability), different phase-matching schemes can result in efficient second harmonic generation.

show abstract

Second harmonic generation from LB superlattices containing two active components

Cited by 97 publications

References 1 publication

Metal–organic frameworks as competitive materials for non-linear optics

Metal–organic frameworks as competitive materials for non-linear optics

Second-harmonic generation in Langmuir–Blodgett monolayers of stilbazium salt and phenylhydrazone dyes

<title>Phase-matched second-harmonic generation in waveguides of polymeric Langmuir-Blodgett films</title>

Contact Info

Product

Resources

About