Calculation of frequency-dependent second hyperpolarizabilities for electric field induced second harmonic generation in the second-order Mo/ller–Plesset perturbation theory

1999 ◽  
Vol 111 (3) ◽  
pp. 842-848 ◽  
Author(s):  
Takao Kobayashi ◽  
Kotoku Sasagane ◽  
Fumihiko Aiga ◽  
Kizashi Yamaguchi
Keyword(s):  
Perturbation Theory ◽  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Second Order ◽  
Frequency Dependent ◽  
Plesset Perturbation Theory

Frequency-Dependent Second Harmonic Generation in Acentric Chromophoric Self-Assembled NLO Materials

1994 ◽  
Vol 351 ◽  
Author(s):  
Shlomo Yitzchaik ◽  
Paul M. Lundquist ◽  
Weiping Lin ◽  
David R. Kanis ◽  
Mark A. Ratner ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Self Assembly ◽  
Second Harmonic ◽  
Second Order ◽  
Frequency Dependent ◽  
Aligned Arrays ◽  
Nlo Materials ◽  
Charge Transfer Excitation ◽  
Self Assembled

ABSTRACTAn attractive and challenging approach to the construction of robust, thin film materials with large second-order optical nonlinearities is the covalent self-assembly of aligned arrays of high-β molecular chromophores into multilayer superlattices. In this paper, we describe the dispersion of second harmonic generation (SHG) in a self-assembled (SA) monolayer containing a stilbazolium chromophore. The frequency-dependent measurements were performed on 25 Å thick monolayers on glass using a tunable (0.4–2 μm) light source based on optical parametric amplification (OPA). The SHG spectrum contains a clear two-photon resonance at hω = 1.3eV. The maximum in the second-order susceptibility coincides with a low energy chromophore-centered charge-transfer excitation at 480 nm. The experimental SHG dispersion values compare favorably with theoretical results computed using a sum-over-states (SOS) formalism. However, the measured values exhibit a somewhat broader band response than the theoretical curve, and the origin of this behavior is discussed.

Moving media: Second harmonic generation investigation

2016 ◽  
Vol 30 (22) ◽  
pp. 1650138
Author(s):  
Mahboubeh Ghalandari
Keyword(s):  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Second Order ◽  
Phase Matching ◽  
Nonlinear Media ◽  
Quasi Phase Matching ◽  
Moving Media ◽  
Order Susceptibility

Because of the importance of second harmonic generation (SHG) in some nonlinear media, in this paper, we investigated induced SHG in diamond where there is no intrinsic second-order susceptibility, [Formula: see text]. The electric field is proposed to introduce moving susceptibility of the second-order and induce second harmonic generation. Then, spatiotemporal quasi-phase matching (QPM) is applied to optimize the induced SHG. Numerical results reveal that in this way, the induced second harmonic is found at the frequency of [Formula: see text] rather than [Formula: see text].

scholarly journals Second Order Nonlinear Optical Properties of 4-Styrylpyridines Axially Coordinated to A4 ZnII Porphyrins: A Comparative Experimental and Theoretical Investigation

Inorganics ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 45
Author(s):  
Francesca Tessore ◽  
Gabriele Di Carlo ◽  
Alessandra Forni ◽  
Stefania Righetto ◽  
Francesca Limosani ◽  
...  
Keyword(s):  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Density Functional ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Second Order ◽  
Strong Electron ◽  
Meso Position ◽  
L1 And L2

In this research, two 4-styrylpyridines carrying an acceptor –NO2 (L1) or a donor –NMe2 group (L2) were axially coordinated to A4 ZnII porphyrins displaying in 5,10,15,20 meso position aryl moieties with remarkable electron withdrawing properties (pentafluorophenyl (TFP)), and with moderate to strong electron donor properties (phenyl (TPP) < 3,5-di-tert-butylphenyl (TBP) < bis(4-tert-butylphenyl)aniline) (TNP)). The second order nonlinear optical (NLO) properties of the resulting complexes were measured in CHCl3 solution by the Electric-Field-Induced Second Harmonic generation technique, and the quadratic hyperpolarizabilities βλ were compared to the Density Functional Theory (DFT)-calculated scalar quantities β||. Our combined experimental and theoretical approach shows that different interactions are involved in the NLO response of L1- and L2-substituted A4 ZnII porphyrins, suggesting a role of backdonation-type mechanisms in the determination of the negative sign of Electric-Field-Induced Second Harmonic generation (EFISH) βλ, and a not negligible third order contribution for L1-carrying complexes.

Second harmonic generation of a series of axially substituted titanium(IV) and gallium(III) tetra-tert-butylphthalocyanines

2003 ◽  
Vol 07 (04) ◽  
pp. 291-295 ◽  
Author(s):  
Christian G. Claessens ◽  
Andreas Gouloumis ◽  
Markus Barthel ◽  
Yu Chen ◽  
Guillermo Martin ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Second Order ◽  
Nonlinear Optical Properties ◽  
Phthalocyanine Ring

Electric Field Induced Second-Harmonic (EFISH) Generation and Hyper Raleigh Scattering (HRS) measurements were performed on a representative series of axially substituted titanium(IV) and gallium(III) tetra-tert-butylphthalocyanines. The comparison of γEFISH and βHRS values within the series and in particular in the case of the dimeric species shows the influence of both the reduction of symmetry of the phthalocyanine ring and the intramolecular stacking on the second order nonlinear optical properties.

DC-electric-field-induced optical second harmonic generation at the smooth metal-electrolyte interface

1995 ◽  
Vol 336 (1-2) ◽  
pp. 225-231 ◽  
Author(s):  
O.A. Aktsipetrov ◽  
A.V. Melnikov ◽  
T.V. Murzina ◽  
A.A. Nikulin ◽  
A.N. Rubtsov
Keyword(s):  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Electrolyte Interface ◽  
Optical Second Harmonic Generation ◽  
Dc Electric Field
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