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PreprintarXiv licencearXiv

Surface-Normal Electric Spin in Obliquely Excited Parallel-Slit SPP Fields

  • Naoki Ichiji
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Abstract

Handedness-dependent light-matter interactions require control of local electric-field rotation, but generating controlled surface-normal spin textures is difficult under oblique illumination. Here, we show that oblique s-polarized illumination of a periodic array of parallel slits produces spatially alternating surface-normal electric spin, with its period tunable by the incidence angle. We further show that the spin texture changes qualitatively between substrate- and air-side excitation depending on whether the SPP field interferes with the excitation field. Under substrate-side excitation, the spin distribution follows the conventional spin-flow relation, whereas under air-side excitation, interference between the SPP and excitation fields produces a distinct spatial periodicity and allows the spin extrema to coincide with the field-intensity maxima. A simple interference model reproduces these contrasting spin textures.

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Cite

BibTeXRIS
BibTeX
@misc{ichiji2026surfacenormal,
  title = {{Surface-Normal Electric Spin in Obliquely Excited Parallel-Slit SPP Fields}},
  author = {Naoki Ichiji},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2609.34224},
  eprint = {2609.34224},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.34224},
}
RIS
TY  - UNPB
TI  - Surface-Normal Electric Spin in Obliquely Excited Parallel-Slit SPP Fields
AU  - Naoki Ichiji
PY  - 2026
DA  - 2026/10/16
PB  - arXiv
DO  - 10.48550/arxiv.2609.34224
UR  - https://arxiv.org/abs/2609.34224
AB  - Handedness-dependent light-matter interactions require control of local electric-field rotation, but generating controlled surface-normal spin textures is difficult under oblique illumination. Here, we show that oblique s-polarized illumination of a periodic array of parallel slits produces spatially alternating surface-normal electric spin, with its period tunable by the incidence angle. We further show that the spin texture changes qualitatively between substrate- and air-side excitation depending on whether the SPP field interferes with the excitation field. Under substrate-side excitation, the spin distribution follows the conventional spin-flow relation, whereas under air-side excitation, interference between the SPP and excitation fields produces a distinct spatial periodicity and allows the spin extrema to coincide with the field-intensity maxima. A simple interference model reproduces these contrasting spin textures.
ER  -