Experimental Evidence for Axial Anisotropy beyond the Diffraction Limit Induced with a Bias Voltage Plasmonic Nanoantenna and Longitudinal Optical Near-Fields in Photoreactive Polymer Thin Films

Sergey S. Kharintsev; Alexander I. Fishman; Sergei G. Kazarian; Ildar R. Gabitov; Myakzyum Kh Salakhov

doi:10.1021/ph5002318

Experimental Evidence for Axial Anisotropy beyond the Diffraction Limit Induced with a Bias Voltage Plasmonic Nanoantenna and Longitudinal Optical Near-Fields in Photoreactive Polymer Thin Films

Sergey S. Kharintsev, Alexander I. Fishman, Sergei G. Kazarian, Ildar R. Gabitov, Myakzyum Kh Salakhov

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

This work highlights a mechanism for inducing axial anisotropy in side-chain nitroazobenzene (NAB) polymer thin films based on the combined effect of both local dc electrical poling and the longitudinal optical near-field. We show that highly anisotropic NAB chromophores are effectively oriented in the glassy environment under optical pumping with 632.8 nm excitation wavelength, which is out of the absorption band of chromophores. Axial anisotropy across the polymer thin film and its non-centrosymmetric behavior beyond the diffraction limit are experimentally rendered with tip-enhanced Raman scattering microscopy and scanning Kelvin probe microscopy. (Chemical Equation Presented).

Original language	English (US)
Pages (from-to)	1025-1032
Number of pages	8
Journal	ACS Photonics
Volume	1
Issue number	10
DOIs	https://doi.org/10.1021/ph5002318
State	Published - Oct 15 2014

Keywords

dc electrical field poling
light-induced molecular motion
optical anisotropy
optical near-field poling
tip-enhanced Raman scattering
trans-cis photoisomerization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biotechnology
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1021/ph5002318

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Experimental Evidence for Axial Anisotropy beyond the Diffraction Limit Induced with a Bias Voltage Plasmonic Nanoantenna and Longitudinal Optical Near-Fields in Photoreactive Polymer Thin Films. / Kharintsev, Sergey S.; Fishman, Alexander I.; Kazarian, Sergei G. et al.
In: ACS Photonics, Vol. 1, No. 10, 15.10.2014, p. 1025-1032.

Research output: Contribution to journal › Article › peer-review

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abstract = "This work highlights a mechanism for inducing axial anisotropy in side-chain nitroazobenzene (NAB) polymer thin films based on the combined effect of both local dc electrical poling and the longitudinal optical near-field. We show that highly anisotropic NAB chromophores are effectively oriented in the glassy environment under optical pumping with 632.8 nm excitation wavelength, which is out of the absorption band of chromophores. Axial anisotropy across the polymer thin film and its non-centrosymmetric behavior beyond the diffraction limit are experimentally rendered with tip-enhanced Raman scattering microscopy and scanning Kelvin probe microscopy. (Chemical Equation Presented).",

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AU - Fishman, Alexander I.

AU - Kazarian, Sergei G.

AU - Gabitov, Ildar R.

AU - Salakhov, Myakzyum Kh

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AB - This work highlights a mechanism for inducing axial anisotropy in side-chain nitroazobenzene (NAB) polymer thin films based on the combined effect of both local dc electrical poling and the longitudinal optical near-field. We show that highly anisotropic NAB chromophores are effectively oriented in the glassy environment under optical pumping with 632.8 nm excitation wavelength, which is out of the absorption band of chromophores. Axial anisotropy across the polymer thin film and its non-centrosymmetric behavior beyond the diffraction limit are experimentally rendered with tip-enhanced Raman scattering microscopy and scanning Kelvin probe microscopy. (Chemical Equation Presented).

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KW - light-induced molecular motion

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Experimental Evidence for Axial Anisotropy beyond the Diffraction Limit Induced with a Bias Voltage Plasmonic Nanoantenna and Longitudinal Optical Near-Fields in Photoreactive Polymer Thin Films

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Keywords

ASJC Scopus subject areas

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