Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.15900 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911688321662976 |
|---|---|
| author | Chen, Tao Wang, Wei Gan, Ziyang Repp, Daniel Zhan, Jinxin George, Antony Schneidewind, Henrik Peschel, Ulf Turchanin, Andrey Deckert, Volker |
| author_facet | Chen, Tao Wang, Wei Gan, Ziyang Repp, Daniel Zhan, Jinxin George, Antony Schneidewind, Henrik Peschel, Ulf Turchanin, Andrey Deckert, Volker |
| contents | The performance of tip-enhanced optical microscopy is often limited by inefficient coupling of the excitation field to the plasmonic tip apex, as well as by thermal drift and optical aberrations. Here, we demonstrate that adaptive wavefront shaping based on Zernike mode provides a practical approach to achieving robust near-field optimisation at the tip apex. Using a sequential feedback algorithm, initially using the near-field signal, we narrow the illumination point-spread function and suppress sidelobes. This demonstrates that Zernike-mode control can be used for both aberration correction and field engineering. In tip-enhanced Raman measurements of a Janus MoSSe monolayer, conventional near-field optimisation increases the signal intensity by around 1.4 fold. A second optimisation step based directly on the Raman-band intensity yields a further 5 to 15 fold enhancement, depending on the specific tips used. These results establish a systematic, optics-based strategy for optimising tip fields, providing a transferable framework for improving tip-enhanced and related near-field spectroscopies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_15900 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Optimized near-field optical response via adaptive tip illumination Chen, Tao Wang, Wei Gan, Ziyang Repp, Daniel Zhan, Jinxin George, Antony Schneidewind, Henrik Peschel, Ulf Turchanin, Andrey Deckert, Volker Optics Mesoscale and Nanoscale Physics The performance of tip-enhanced optical microscopy is often limited by inefficient coupling of the excitation field to the plasmonic tip apex, as well as by thermal drift and optical aberrations. Here, we demonstrate that adaptive wavefront shaping based on Zernike mode provides a practical approach to achieving robust near-field optimisation at the tip apex. Using a sequential feedback algorithm, initially using the near-field signal, we narrow the illumination point-spread function and suppress sidelobes. This demonstrates that Zernike-mode control can be used for both aberration correction and field engineering. In tip-enhanced Raman measurements of a Janus MoSSe monolayer, conventional near-field optimisation increases the signal intensity by around 1.4 fold. A second optimisation step based directly on the Raman-band intensity yields a further 5 to 15 fold enhancement, depending on the specific tips used. These results establish a systematic, optics-based strategy for optimising tip fields, providing a transferable framework for improving tip-enhanced and related near-field spectroscopies. |
| title | Optimized near-field optical response via adaptive tip illumination |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2605.15900 |