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Titolo:
Optimization of the molecular hyperpolarizability for second harmonic generation in chiral media
Autore:
Ostroverkhov, V; Ostroverkhova, O; Petschek, RG; Singer, KD; Sukhomlinova, L; Twieg, RJ; Wang, SX; Chien, LC;
Indirizzi:
Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA Case WesternReserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA Kent State Univ Kent OH USA 44242 Inst Liquid Crystal, Kent, OH 44242 USA Kent State Univ, Dept Chem, Kent, OH 44242 USA Kent State Univ Kent OH USA 44242 ate Univ, Dept Chem, Kent, OH 44242 USA
Titolo Testata:
CHEMICAL PHYSICS
fascicolo: 2-3, volume: 257, anno: 2000,
pagine: 263 - 274
SICI:
0301-0104(20000715)257:2-3<263:OOTMHF>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONLINEAR-OPTICAL PROPERTIES; 2ND-ORDER POLARIZABILITY TENSOR; INDUCED 2ND-HARMONIC GENERATION; LIQUID-CRYSTALS; SYSTEMS; CHROMOPHORES; SUSCEPTIBILITIES; POLYMERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Singer, KD Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 OH 44106 USA
Citazione:
V. Ostroverkhov et al., "Optimization of the molecular hyperpolarizability for second harmonic generation in chiral media", CHEM PHYS, 257(2-3), 2000, pp. 263-274

Abstract

Molecular properties leading to second harmonic generation in chiral mediain the electric dipole approximation for the cases of axial and biaxial symmetry are described. The components of the hyperpolarizability tensor thattransform like a second-rank pseudotensor (L = 2) and a third-rank tensor (L = 3) contribute. The sum-over-states quantum formula for the hyperpolarizability is used to illuminate the molecular features necessary for optimizing the second-rank pseudotensor for dipolar molecules including orthogonalmoments and high frequency. The example of C-2 nu, appropriate for Lambda-shaped molecules, is examined in more detail. Results of the measurements of these components in representative molecules using hyper-Rayleigh scattering are presented. Two compounds in which the delocalized pi-system is two-dimensional, a camphorquinone derivative and crystal violet are found to exhibit sizable L = 2 and L = 3 components. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 05/04/20 alle ore 06:58:58