Wavefront microscopy for Nanophotonics
DIPC Seminars
- Speaker
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Guillaume Baffou
Institut Fresnel, CNRS - When
-
2025/11/06
12:00 - Place
- DIPC Josebe Olarra Seminar Room
- Host
- Marek Grzelczak
- Add to calendar
-
iCal
Cross-grating wavefront microscopy (CGM) is a quantitative phase imaging technique that can map the wavefront distortion created by objects lying at the sample plane of a microscope, with a diffraction limited resolution [1]. CGM is based on the use of a 2D diffraction grating placed at the vicinity of a camera sensor. In this presentation, I will introduce the CGM technique, and detail the applications we recently tackled in nanophotonics. In particular, I will explain how CGM can be used as a temperature microscopy technique, in particular for applications involving laser heating of plasmonic nanoparticles. And I will explain how CGM can be used as an ideal metrology tool in nanophotonics, by measuring the complex optical polarizability of nanoparticles, the complex refractive index map of 2D materials, and the wavefront distortion of
metasurfaces.
[1] Wavefront microscopy using quadriwave lateral shearing interferometry: from bioimaging to nanophotonics. G. Baffou, ACS Photonics 10, 322-339 (2023)
Zoom: https://dipc-org.zoom.us/j/
Youtube: https://youtube.com/live/