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Near-field distribution and propagation of scattering resonances in Vogel spiral arrays of dielectric nanopillars.

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Title: Near-field distribution and propagation of scattering resonances in Vogel spiral arrays of dielectric nanopillars.
Authors: Intonti, F.1 intonti@lens.unifi.it, Caselli, N.1, Lawrence, N.2, Trevino, J.3, Wiersma, D. S.1, Dal Negro, L.2,3 dalnegro@bu.edu
Source: New Journal of Physics. 2013, Vol. 15 Issue 8, p1-12. 12p.
Subjects: Intracranial tumors, Brain tumors, Tumor surgery, Magnetic resonance imaging, Clinical chemistry, Thickness measurement, Near-field microscopy, Tumor treatment
Abstract: In this work, we employ scanning near-field optical microscopy, full-vector finite difference time domain numerical simulations and fractional Fourier transformation to investigate the near-field and propagation behavior of the electromagnetic energy scattered at 1.56μm by dielectric arrays of silicon nitride nanopillars with chiral α1-Vogel spiral geometry. In particular, we experimentally study the spatial evolution of scattered radiation and demonstrate near-field coupling between adjacent nanopillars along the parastichies arms. Moreover, by measuring the spatial distribution of the scattered radiation at different heights from the array plane, we demonstrate a characteristic rotation of the scattered field pattern consistent with net transfer of orbital angular momentum in the Fresnel zone, within a few micrometers from the plane of the array. Our experimental results agree with the simulations we performed and may be of interest to nanophotonics applications. [ABSTRACT FROM AUTHOR]
Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 90114020
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Near-field distribution and propagation of scattering resonances in Vogel spiral arrays of dielectric nanopillars.
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  Data: <searchLink fieldCode="AR" term="%22Intonti%2C+F%2E%22">Intonti, F.</searchLink><relatesTo>1</relatesTo><i> intonti@lens.unifi.it</i><br /><searchLink fieldCode="AR" term="%22Caselli%2C+N%2E%22">Caselli, N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lawrence%2C+N%2E%22">Lawrence, N.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Trevino%2C+J%2E%22">Trevino, J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Wiersma%2C+D%2E+S%2E%22">Wiersma, D. S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dal+Negro%2C+L%2E%22">Dal Negro, L.</searchLink><relatesTo>2,3</relatesTo><i> dalnegro@bu.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22New+Journal+of+Physics%22">New Journal of Physics</searchLink>. 2013, Vol. 15 Issue 8, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Intracranial+tumors%22">Intracranial tumors</searchLink><br /><searchLink fieldCode="DE" term="%22Brain+tumors%22">Brain tumors</searchLink><br /><searchLink fieldCode="DE" term="%22Tumor+surgery%22">Tumor surgery</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+resonance+imaging%22">Magnetic resonance imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Clinical+chemistry%22">Clinical chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Thickness+measurement%22">Thickness measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Near-field+microscopy%22">Near-field microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Tumor+treatment%22">Tumor treatment</searchLink>
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  Label: Abstract
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  Data: In this work, we employ scanning near-field optical microscopy, full-vector finite difference time domain numerical simulations and fractional Fourier transformation to investigate the near-field and propagation behavior of the electromagnetic energy scattered at 1.56μm by dielectric arrays of silicon nitride nanopillars with chiral α1-Vogel spiral geometry. In particular, we experimentally study the spatial evolution of scattered radiation and demonstrate near-field coupling between adjacent nanopillars along the parastichies arms. Moreover, by measuring the spatial distribution of the scattered radiation at different heights from the array plane, we demonstrate a characteristic rotation of the scattered field pattern consistent with net transfer of orbital angular momentum in the Fresnel zone, within a few micrometers from the plane of the array. Our experimental results agree with the simulations we performed and may be of interest to nanophotonics applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1088/1367-2630/15/8/085023
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      – Code: eng
        Text: English
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        PageCount: 12
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    Subjects:
      – SubjectFull: Intracranial tumors
        Type: general
      – SubjectFull: Brain tumors
        Type: general
      – SubjectFull: Tumor surgery
        Type: general
      – SubjectFull: Magnetic resonance imaging
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      – SubjectFull: Clinical chemistry
        Type: general
      – SubjectFull: Thickness measurement
        Type: general
      – SubjectFull: Near-field microscopy
        Type: general
      – SubjectFull: Tumor treatment
        Type: general
    Titles:
      – TitleFull: Near-field distribution and propagation of scattering resonances in Vogel spiral arrays of dielectric nanopillars.
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            NameFull: Intonti, F.
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            NameFull: Caselli, N.
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            NameFull: Lawrence, N.
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              M: 08
              Text: 2013
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              Y: 2013
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              Value: 8
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