Multipolar molecules and multipolar fields: probing and controlling the tensorial nature of nonlinear molecular media

Brasselet, Sophie; Zyss, Joseph

doi:10.1364/josab.15.000257

Cited by 271 publications

(222 citation statements)

References 37 publications

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“…[16][17][18][19][20][21][22][23][24]. The starting point is a consideration of the irreducible Cartesian tensor components of the polarization and molecular response tensors [13].…”

Section: Symmetry-based Selection Rulesmentioning

confidence: 99%

Laser-modified one- and two-photon absorption: Expanding the scope of optical nonlinearity

Andrews

2013

Phys. Rev. A

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It is shown that conventional one-photon and two-photon absorption processes can be made subject to nonlinear optical control, in each case significantly modifying the efficiency of absorption, through the effect of a secondary, off-resonant stimulus laser beam. The mechanistic origin of these laser-modified absorption processes, in which the stimulus beam emerges unchanged, is traced to higher-order terms in standard perturbation treatments. These normally insignificant terms become unusually prominent when the secondary optical stimulus is moderately intense. Employing a quantum formulation, the effects of the stimulus beam on one-photon and two-photon absorption are analyzed, and calculations are performed to determine the degree of absorption enhancement, and the form of spectral manifestation, under various laser intensities. The implications of differences in selection rules are also considered and exemplified, leading to the identification of dark states that can be populated as a result of laser-modified absorption. Attention is also drawn to the possibility of quantum nondemolition measurements, based on such a form of optical nonlinearity.

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“…[16][17][18][19][20][21][22][23][24]. The starting point is a consideration of the irreducible Cartesian tensor components of the polarization and molecular response tensors [13].…”

Section: Symmetry-based Selection Rulesmentioning

confidence: 99%

Laser-modified one- and two-photon absorption: Expanding the scope of optical nonlinearity

Andrews

2013

Phys. Rev. A

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“…Since the chromophores are polar molecules with a static dipole moment μ 0 , they will interact, thereby minimizing their energy and forming an anti-ferroelectric state, where neighbouring chromophores are preferentially oriented in opposite directions, leading to a decrease of the effective electro-optic coefficient [27]. In order to avoid the negative interaction between chromophores, non-polar second order nonlinear molecule were proposed [35]. Unfortunately, in these molecules, since they have no μ 0 , it is not possible to align them using the standard poling procedure shown previously.…”

Section: Steady-state Properties Of the Induced Electo-optic Coefficientmentioning

confidence: 99%

“…Unfortunately, in these molecules, since they have no μ 0 , it is not possible to align them using the standard poling procedure shown previously. A more complicated all-optical poling was proposed [35].…”

Section: Steady-state Properties Of the Induced Electo-optic Coefficientmentioning

confidence: 99%

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Belardini

2012

Applied Sciences

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Abstract:Organic fluorinated materials demonstrate their excellent electro-optic properties and versatility for technological applications. The partial substitution of hydrogen with fluorine in carbon-halides bounds allows the reduction of absorption losses at the telecommunication wavelengths. In these interesting compounds, the electro-optic coefficient was typically induced by a poling procedure. The magnitude and the time stability of the coefficient is an important issue to be investigated in order to compare copolymer species. Here, a review of different measurement techniques (such as nonlinear ellipsometry, second harmonic generation, temperature scanning and isothermal relaxation) was shown and applied to a variety of fluorinated and non-fluorinated electro-optic compounds.

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“…The result accommodates both near-field and wave-zone limits. In the near-field; when kR  1, virtual features of the emergent photon are most apparent, [27] and the electric field has significant longitudinal components with respect to R; transversality emerges with propagation into the wave-zone, kR  1, as forward propagation becomes dominated by contributions with wave-vector k closely parallel to R. Moreover, the index-symmetric tensor V can be cast as a sum of two terms, one associated with angular momentum j = 0, the other j = 2, respectively represented by the two squarebracketed terms on the right in the following; [30][31][32] ( ) ( ) …”

Section: Fi R I F S I F T I F I T I S I R F H T T H R S H R R H I M Ementioning

confidence: 99%

Structured light, transmission, and scattering

Andrews

2011

SPIE Proceedings

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Numerous theoretical and experimental studies have established the principle that beams conveying orbital angular momentum offer a rich scope for information transfer. However, it is not clear how far it is practicable to operate such a concept at the single-photon level -especially when such a beam propagates through a system in which scattering can occur. In cases where scattering leads to photon deflection, it produces losses; however in terms of the retention of information content, there should be more concern over forward scattering. Based on a quantum electrodynamical formulation of theory, this paper aims to frame and resolve the key issues. A quantum amplitude is constructed for the representation of single and multiple scattering events in the propagation an individual photon, from a suitably structured beam. The analysis identifies potential limitations of principle, undermining complete fidelity of quantum information transmission.

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Multipolar molecules and multipolar fields: probing and controlling the tensorial nature of nonlinear molecular media

Cited by 271 publications

References 37 publications

Laser-modified one- and two-photon absorption: Expanding the scope of optical nonlinearity

Laser-modified one- and two-photon absorption: Expanding the scope of optical nonlinearity

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Structured light, transmission, and scattering

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