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PreprintarXiv licencearXiv

Chiral near-fields at achiral plasmonic tips enable nanoscale valley polarimetry

  • Jonggeun Hwang
  • Kijeong Park
  • Hyeongwoo Lee
  • Yeonjeong Koo
  • SeokJae Yoo
  • Long Ju
  • Kyoung-Duck Park
Open at sourcePDFDOICite

Abstract

Optical helicity is central to chiral light-matter interactions, yet plasmonic confinement typically distorts it at the nanoscale. Here, we demonstrate nanoscale valley polarimetry using an achiral Au tip, where incidence-angle control of circularly polarized light creates a strongly localized, helicity-preserving near-field. Chiral tip-enhanced photoluminescence (c-TEPL) directly resolves and reverses local valley polarization in monolayer WSe2 and reveals nanoscale polarization variations in strained MoS2 hidden by diffraction-limited measurements.

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Cite

BibTeXRIS
BibTeX
@misc{hwang2026chiral,
  title = {{Chiral near-fields at achiral plasmonic tips enable nanoscale valley polarimetry}},
  author = {Jonggeun Hwang and Kijeong Park and Hyeongwoo Lee and Yeonjeong Koo and SeokJae Yoo and Long Ju and Kyoung-Duck Park},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.29972},
  eprint = {2610.29972},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.29972},
}
RIS
TY  - UNPB
TI  - Chiral near-fields at achiral plasmonic tips enable nanoscale valley polarimetry
AU  - Jonggeun Hwang
AU  - Kijeong Park
AU  - Hyeongwoo Lee
AU  - Yeonjeong Koo
AU  - SeokJae Yoo
AU  - Long Ju
AU  - Kyoung-Duck Park
PY  - 2026
DA  - 2026/10/21
PB  - arXiv
DO  - 10.48550/arxiv.2610.29972
UR  - https://arxiv.org/abs/2610.29972
AB  - Optical helicity is central to chiral light-matter interactions, yet plasmonic confinement typically distorts it at the nanoscale. Here, we demonstrate nanoscale valley polarimetry using an achiral Au tip, where incidence-angle control of circularly polarized light creates a strongly localized, helicity-preserving near-field. Chiral tip-enhanced photoluminescence (c-TEPL) directly resolves and reverses local valley polarization in monolayer WSe2 and reveals nanoscale polarization variations in strained MoS2 hidden by diffraction-limited measurements.
ER  -