Dataset for Meta-ROA: metasurface-mediated Raman optical activity from achiral molecules on plasmonic nanohelices

This dataset contains the experimental and fitting data for the titled manuscript. Experimental data included data for the Lissajous figures of incident RCP and LCP light, Raman spectroscopy, Raman optical activity, and measured difference ratio.

Keywords:

Raman Optical Activity Chirality transfer Surface Enhanced Raman Spectroscopy

Subjects:

Optics, photonics and lasers

Cite this dataset as:
Ji, R., Kerr, J., Smith, B., Batten, T., Fischer, P., Wolverson, D., Valev, V., 2026. Dataset for Meta-ROA: metasurface-mediated Raman optical activity from achiral molecules on plasmonic nanohelices. Bath: University of Bath Research Data Archive. Available from: https://doi.org/10.15125/BATH-01599.

Export

Data

Fig2.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (170kB)
Creative Commons: Attribution 4.0

Validation of the Raman optical activity system using achiral references. Lissajous figures confirm RCP and LCP excitation at the sample position. Raman measurements of CVD diamond and crystal violet on an achiral SERS substrate show no significant circular differential response, demonstrating minimal instrumental artefacts and reliable polarization control.

Fig3.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (440kB)
Creative Commons: Attribution 4.0

Meta-Raman optical activity (Meta-ROA) of achiral crystal violet (CV), rhodamine 6G (R6G), and methylene blue (MB) molecules adsorbed on chiral Au and Ag nanohelices. Raman spectra under RCP and LCP excitation reveal handedness-dependent responses, with opposite Meta-ROA signals from left- and right-handed nanohelices.

Fig4.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (66kB)
Creative Commons: Attribution 4.0

Meta-Raman optical activity (Meta-ROA) of rhodamine 6G (R6G) molecules on left- and right-handed Ag nanohelices, measured under 532 nm excitation. Circular difference ratios are presented for both Stokes and anti-Stokes Raman scattering, revealing handedness-dependent chiroptical responses.

Fig5.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (168kB)
Creative Commons: Attribution 4.0

Meta-Raman optical activity (Meta-ROA) of crystal violet (CV) molecules on left- and right-handed Au nanohelices, characterized through circular polarization transfer measurements. Background-corrected Raman spectra for RCP→RCP, LCP→LCP, RCP→LCP, and LCP→RCP configurations are used to determine the normalized DCP1 and DCP2, revealing polarization-dependent chiroptical responses.

Fig6.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (172kB)
Creative Commons: Attribution 4.0

Dual circular polarization Meta-Raman optical activity (Meta-ROA) of rhodamine 6G (R6G) molecules adsorbed on left- and right-handed Au and Ag nanohelices. Background-corrected Raman spectra under RCP→RCP and LCP→LCP configurations are used to calculate normalized DCP1, demonstrating chiroptical responses across both plasmonic materials.

Creators

Ruidong Ji
University of Bath

0000-0003-0641-5891

John Kerr
University of Bath

0009-0001-4253-8082

Brian Smith
Renishaw

Tim Batten
Renishaw

0000-0002-3245-4985

Peer Fischer
Max Planck Institute for Intelligent Systems; University of Stuttgart; University of Heidelberg; Lawrence Berkeley National Laboratory

0000-0002-8600-5958

Daniel Wolverson
University of Bath

0000-0002-5578-6018

Ventsislav Valev
University of Bath

0000-0001-9951-1836

Contributors

University of Bath
Rights Holder

Documentation

Data collection method:

For full details of the methodology, please see the methods section of the associated paper.

Data processing and preparation activities:

The background removal fitting was done by MATLAB.

Technical details and requirements:

Measurements of the samples was done using a Renishaw inVia Raman microscope modified to allow of delivery of circularly polarised light (CPL). The software used for simulations was MATLAB 2022b