Dataset for "Chiroptical Second-Harmonic Tyndall from Silicon Nanohelices"

This dataset contains the experimental and simulation data for the titled manuscript. Experimental data included data for the power dependences, emission spectra, measured linear CD and calculated nonlinear g-factors and nonlinear CD from extinction.

Chirality, Harmonic scattering
Optics, photonics and lasers

Cite this dataset as:
Olohan, B., Petronijevic, E., 2024. Dataset for "Chiroptical Second-Harmonic Tyndall from Silicon Nanohelices". Bath: University of Bath Research Data Archive. Available from:


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application/zip (860kB)
Creative Commons: Attribution 4.0

Data containing all the raw experimental data for the power and emission measurements, as well as the linear CD.

application/zip (15MB)
Creative Commons: Attribution 4.0

Data regarding the simulations data for simulated CD, and the multipole decomposition.


Ben Olohan
University of Bath

Emilija Petronijevic
Sapienza University of Rome


University of Bath
Rights Holder


Data collection method:

Experimental data was recorded directly from the SR500 photon counter to a .txt file using LabView 2016 with a counting time of 5s. Data was imported into OriginPro2021 and organised. Medians were taken of the data and the resulting averages arranged to their corresponding scattering types (right angle, forward, RCP, LCP light) A mean of all data corresponding to a reference data for a given power was taken, and plotted as a function of measured power to give a curve. The averages for the second harmonic intensity is fitted against this curve to give an accurate average power ------------------------------------------------------------------------ Simulated data collected using Lumerical FDTD solver. For linear simulations, we extracted scattering and absorption cross sections from 6 power monitors surrounding the source and nanoparticle respectively. For the absorption 3D distribution, linear simulations provided absorption density in the nanoparticle which was then plotted in Matlab. For multipole solver, electromagnetic fields were extracted from 6 field profile monitors around the nanoparticle and from the refractive index profile monitor. These fields were then imported into MENP solver in MatLab (see link at end). Nonlinear simulations used chi 2 medium for the nanohelix and continuous wave normalisation was turned off. A high intensity fundamental field excited the nanohelix and near fields at second harmonic wavelength were measured by field profile monitors.

Technical details and requirements:

Raw data files can be accessed using notepad or other program that can open .txt files. Files containing the graphs and processed data require OriginPro. Software for simulations: Lumerical 2022, MatLab 2022b

Additional information:

Experimental data: Data files for a given measurement are placed in a named folder describing the measurement. (eg Si-pos power 750 nm refers to power dependence measurements for the Si (+) helices performed at an incident wavelength of 750 nm) ----------------------------------------- Simulation: Files for each simulation are placed in folders describing the type of simulation (eg multipole, SHS). Individual files are named with the wavelength, nanohelix orientation and circular polarisation used.

Methodology link:

Hinamoto, T., and Fujii, M., 2021. MENP: an open-source MATLAB implementation of multipole expansion for nanophotonics. OSA Continuum, 4(5), 1640. Available from:

Documentation Files

Readme Experimental.txt
text/plain (976B)
Creative Commons: Attribution 4.0

ReadMe Simulations.txt
text/plain (2kB)
Creative Commons: Attribution 4.0


Enhanced Research Expenses for URFs

International Collaboration Awards of the RS - Clean Air

Fellowship - Chirality in the 21st century: enantiomorphing chiral plasmonic meta/nano-materials

Engineering and Physical Sciences Research Council

UK National Quantum Technology Hub in Sensing and Timing

PERSEUS: molecular Polarizability Established by Rayleigh Scattering Enhancement and Ultra-Spectral analysis

Publication details

Publication date: 17 June 2024
by: University of Bath

Version: 1


URL for this record:

Related papers and books

Olohan, B. J., Petronijevic, E., Kilic, U., Wimer, S., Hilfiker, M., Schubert, M., Argyropoulos, C., Schubert, E., Clowes, S. R., PantoĊŸ, G. D., Andrews, D. L., and Valev, V. K., 2024. Chiroptical Second-Harmonic Tyndall Scattering from Silicon Nanohelices. ACS Nano. Available from:

Contact information

Please contact the Research Data Service in the first instance for all matters concerning this item.

Contact person: Ben Olohan


Faculty of Science

Research Centres & Institutes
Centre for Photonics and Photonic Materials