NLO response of photoswitchable azobenzene-based materials

Nikolaos Liaros, Stelios Couris, Laura Maggini, Federica De Leo, Fabrizio Cattaruzza, Claudia Aurisicchio, Davide Bonifazi

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives was investigated under picosecond laser excitation by means of the Z-scan technique to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. All modules possessed large third-order nonlinearity, but unexpectedly it was the less extended AB derivative that exhibited the largest NLO response. This finding has been confirmed by means of DFT calculations and was attributed to a higher cis/trans ratio of the particular AB derivative in its investigated photoequilibrated state. Furthermore, the influence of the amount of cis isomer on the third-order nonlinear susceptibility [χ(3)] of the less extended AB derivative has been thoroughly investigated. Specifically, modulation of the NLO response has been successfully achieved by tuning the isomeric composition of the investigated photostationary state. These results highlighted the cis-dependent increase of the NLO response to support the general idea that such compounds can be used for multistep switching NLO materials. Flick of a switch: The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives is investigated to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. A cis-isomer-dependent increase of the NLO response, together with intrinsic structure-related high hyperpolarizability values, determined these compounds superb candidates for ultrafast switching NLO devices.

langue originaleAnglais
Pages (de - à)2961-2972
Nombre de pages12
journalChemPhysChem
Volume14
Numéro de publication13
Les DOIs
étatPublié - 16 sept. 2013

Empreinte digitale

Derivatives
Isomers
spacers
Optical properties
isomers
Laser excitation
Optical materials
optical properties
Optical devices
Discrete Fourier transforms
optical materials
Tuning
Switches
Modulation
azobenzene
switches
modules
nonlinearity
tuning
magnetic permeability

Citer ceci

Liaros, Nikolaos ; Couris, Stelios ; Maggini, Laura ; De Leo, Federica ; Cattaruzza, Fabrizio ; Aurisicchio, Claudia ; Bonifazi, Davide. / NLO response of photoswitchable azobenzene-based materials. Dans: ChemPhysChem. 2013 ; Vol 14, Numéro 13. p. 2961-2972.
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abstract = "The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives was investigated under picosecond laser excitation by means of the Z-scan technique to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. All modules possessed large third-order nonlinearity, but unexpectedly it was the less extended AB derivative that exhibited the largest NLO response. This finding has been confirmed by means of DFT calculations and was attributed to a higher cis/trans ratio of the particular AB derivative in its investigated photoequilibrated state. Furthermore, the influence of the amount of cis isomer on the third-order nonlinear susceptibility [χ(3)] of the less extended AB derivative has been thoroughly investigated. Specifically, modulation of the NLO response has been successfully achieved by tuning the isomeric composition of the investigated photostationary state. These results highlighted the cis-dependent increase of the NLO response to support the general idea that such compounds can be used for multistep switching NLO materials. Flick of a switch: The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives is investigated to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. A cis-isomer-dependent increase of the NLO response, together with intrinsic structure-related high hyperpolarizability values, determined these compounds superb candidates for ultrafast switching NLO devices.",
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NLO response of photoswitchable azobenzene-based materials. / Liaros, Nikolaos; Couris, Stelios; Maggini, Laura; De Leo, Federica; Cattaruzza, Fabrizio; Aurisicchio, Claudia; Bonifazi, Davide.

Dans: ChemPhysChem, Vol 14, Numéro 13, 16.09.2013, p. 2961-2972.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - NLO response of photoswitchable azobenzene-based materials

AU - Liaros, Nikolaos

AU - Couris, Stelios

AU - Maggini, Laura

AU - De Leo, Federica

AU - Cattaruzza, Fabrizio

AU - Aurisicchio, Claudia

AU - Bonifazi, Davide

PY - 2013/9/16

Y1 - 2013/9/16

N2 - The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives was investigated under picosecond laser excitation by means of the Z-scan technique to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. All modules possessed large third-order nonlinearity, but unexpectedly it was the less extended AB derivative that exhibited the largest NLO response. This finding has been confirmed by means of DFT calculations and was attributed to a higher cis/trans ratio of the particular AB derivative in its investigated photoequilibrated state. Furthermore, the influence of the amount of cis isomer on the third-order nonlinear susceptibility [χ(3)] of the less extended AB derivative has been thoroughly investigated. Specifically, modulation of the NLO response has been successfully achieved by tuning the isomeric composition of the investigated photostationary state. These results highlighted the cis-dependent increase of the NLO response to support the general idea that such compounds can be used for multistep switching NLO materials. Flick of a switch: The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives is investigated to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. A cis-isomer-dependent increase of the NLO response, together with intrinsic structure-related high hyperpolarizability values, determined these compounds superb candidates for ultrafast switching NLO devices.

AB - The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives was investigated under picosecond laser excitation by means of the Z-scan technique to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. All modules possessed large third-order nonlinearity, but unexpectedly it was the less extended AB derivative that exhibited the largest NLO response. This finding has been confirmed by means of DFT calculations and was attributed to a higher cis/trans ratio of the particular AB derivative in its investigated photoequilibrated state. Furthermore, the influence of the amount of cis isomer on the third-order nonlinear susceptibility [χ(3)] of the less extended AB derivative has been thoroughly investigated. Specifically, modulation of the NLO response has been successfully achieved by tuning the isomeric composition of the investigated photostationary state. These results highlighted the cis-dependent increase of the NLO response to support the general idea that such compounds can be used for multistep switching NLO materials. Flick of a switch: The nonlinear optical (NLO) response of three π-conjugated azobenzene (AB) derivatives is investigated to evaluate the effect of an ethynyl-based conjugated spacer on the NLO properties of ABs. A cis-isomer-dependent increase of the NLO response, together with intrinsic structure-related high hyperpolarizability values, determined these compounds superb candidates for ultrafast switching NLO devices.

KW - azobenzenes

KW - density functional calculations

KW - nonlinear absorption

KW - nonlinear optical properties

KW - nonlinear refraction

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SN - 1439-4235

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