Single acquisition reconstruction of nonlinear susceptibility and Raman tensors at the diffraction limit
Abstract
Quantitative extraction of nonlinear optical tensors at the microscale typically requires sequential polarization scans, mechanical rotations, and careful correction of high-NA polarization distortions. We introduce a single-acquisition tensor metrology approach that simultaneously acquires Raman and second-harmonic generation (SHG) signals and enables rapid reconstruction of both Raman and χ(2) tensors from a single diffraction-limited volume. The central innovation is the use of a tightly focused Bessel–Gauss beam whose intrinsic spatiotemporal structure encodes multiple excitation geometries—normal and finite incidence—within a single measurement. The resulting Fourier-plane SHG pattern contains rich polarization and angular information, eliminating mechanical rotation and reducing acquisition time. Combined with a polarization-preserving dichroic module and graphics processing unit-accelerated ray-tracing global fitting, the method exploits the full two-dimensional SHG emission pattern together with polarization-resolved Raman data. We demonstrate quantitative tensor extraction in LiNbO3 and correlate symmetry breaking across the ferroelectric transition of KH2PO4. This approach establishes rapid, calibration-robust optical tensor tomography for microscale materials.
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BibTeX
@article{restelli2026single,
title = {{Single acquisition reconstruction of nonlinear susceptibility and Raman tensors at the diffraction limit}},
author = {Simone Restelli and Oliviero Cannelli and Nicola Colonna and Carmelo Grova and Paolo Usai and Michele Puppin and Mounir Mensi and Francesco Barantani and Yue Meng and Jérémie Teyssier and Malte Oppermann and Francesco Pennacchio and Camila Bacellar and Jérémy Rouxel and Ludmila Diniz Leroy and Oleg Dogadov and Natacha Ohannessian and Daniele Pergolesi and Pietro Galinetto and Przemysław Piekarz and Andrzej Ptok and Swati Chaudhary and Gregory Fiete and Majed Chergui and Edoardo Baldini and Giulia Mancini},
journal = {APL Photonics},
year = {2026},
month = jun,
doi = {10.1063/5.0331167},
url = {https://hal.science/hal-05794572v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Single acquisition reconstruction of nonlinear susceptibility and Raman tensors at the diffraction limit
AU - Simone Restelli
AU - Oliviero Cannelli
AU - Nicola Colonna
AU - Carmelo Grova
AU - Paolo Usai
AU - Michele Puppin
AU - Mounir Mensi
AU - Francesco Barantani
AU - Yue Meng
AU - Jérémie Teyssier
AU - Malte Oppermann
AU - Francesco Pennacchio
AU - Camila Bacellar
AU - Jérémy Rouxel
AU - Ludmila Diniz Leroy
AU - Oleg Dogadov
AU - Natacha Ohannessian
AU - Daniele Pergolesi
AU - Pietro Galinetto
AU - Przemysław Piekarz
AU - Andrzej Ptok
AU - Swati Chaudhary
AU - Gregory Fiete
AU - Majed Chergui
AU - Edoardo Baldini
AU - Giulia Mancini
PY - 2026
DA - 2026/06/01
JO - APL Photonics
DO - 10.1063/5.0331167
UR - https://hal.science/hal-05794572v1
AB - Quantitative extraction of nonlinear optical tensors at the microscale typically requires sequential polarization scans, mechanical rotations, and careful correction of high-NA polarization distortions. We introduce a single-acquisition tensor metrology approach that simultaneously acquires Raman and second-harmonic generation (SHG) signals and enables rapid reconstruction of both Raman and χ(2) tensors from a single diffraction-limited volume. The central innovation is the use of a tightly focused Bessel–Gauss beam whose intrinsic spatiotemporal structure encodes multiple excitation geometries—normal and finite incidence—within a single measurement. The resulting Fourier-plane SHG pattern contains rich polarization and angular information, eliminating mechanical rotation and reducing acquisition time. Combined with a polarization-preserving dichroic module and graphics processing unit-accelerated ray-tracing global fitting, the method exploits the full two-dimensional SHG emission pattern together with polarization-resolved Raman data. We demonstrate quantitative tensor extraction in LiNbO3 and correlate symmetry breaking across the ferroelectric transition of KH2PO4. This approach establishes rapid, calibration-robust optical tensor tomography for microscale materials.
SN - 2378-0967
ER -