Scaling in light scattering by sharp conical metal tips

Anders Lambertus Pors, Khackatur V. Nerkararyan, Sergey I. Bozhevolnyi

Research output: Contribution to journalLetterResearchpeer-review

Abstract

Using the electrostatic approximation, we analyze electromagnetic fields scattered by sharp conical metal tips, which are illuminated with light polarized along the tip axis. We establish scaling relations for the scattered field amplitude and phase, and verify the validity with numerical simulations. Analytic expressions for the wavelength at which the scattered field near the tip changes its direction and for the field decay near the tip extremity are obtained, relating these characteristics to the cone angle and metal permittivity. The results obtained have important implications for various tip-enhanced phenomena, ranging from Raman and scattering near-field imaging to photoemission spectroscopy and nano-optical trapping.
Original languageEnglish
JournalOptics Letters
Volume39
Issue number11
Pages (from-to)3308-3311
ISSN0146-9592
DOIs
Publication statusPublished - 29. May 2014

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light scattering
scaling
metals
near fields
polarized light
cones
electromagnetic fields
photoelectric emission
trapping
permittivity
electrostatics
decay
approximation
scattering
wavelengths
spectroscopy
simulation

Cite this

Pors, Anders Lambertus ; Nerkararyan, Khackatur V. ; Bozhevolnyi, Sergey I. / Scaling in light scattering by sharp conical metal tips. In: Optics Letters. 2014 ; Vol. 39, No. 11. pp. 3308-3311.
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Scaling in light scattering by sharp conical metal tips. / Pors, Anders Lambertus; Nerkararyan, Khackatur V.; Bozhevolnyi, Sergey I.

In: Optics Letters, Vol. 39, No. 11, 29.05.2014, p. 3308-3311.

Research output: Contribution to journalLetterResearchpeer-review

TY - JOUR

T1 - Scaling in light scattering by sharp conical metal tips

AU - Pors, Anders Lambertus

AU - Nerkararyan, Khackatur V.

AU - Bozhevolnyi, Sergey I.

PY - 2014/5/29

Y1 - 2014/5/29

N2 - Using the electrostatic approximation, we analyze electromagnetic fields scattered by sharp conical metal tips, which are illuminated with light polarized along the tip axis. We establish scaling relations for the scattered field amplitude and phase, and verify the validity with numerical simulations. Analytic expressions for the wavelength at which the scattered field near the tip changes its direction and for the field decay near the tip extremity are obtained, relating these characteristics to the cone angle and metal permittivity. The results obtained have important implications for various tip-enhanced phenomena, ranging from Raman and scattering near-field imaging to photoemission spectroscopy and nano-optical trapping.

AB - Using the electrostatic approximation, we analyze electromagnetic fields scattered by sharp conical metal tips, which are illuminated with light polarized along the tip axis. We establish scaling relations for the scattered field amplitude and phase, and verify the validity with numerical simulations. Analytic expressions for the wavelength at which the scattered field near the tip changes its direction and for the field decay near the tip extremity are obtained, relating these characteristics to the cone angle and metal permittivity. The results obtained have important implications for various tip-enhanced phenomena, ranging from Raman and scattering near-field imaging to photoemission spectroscopy and nano-optical trapping.

U2 - 10.1364/OL.39.003308

DO - 10.1364/OL.39.003308

M3 - Letter

VL - 39

SP - 3308

EP - 3311

JO - Optics Letters

JF - Optics Letters

SN - 0146-9592

IS - 11

ER -