Metasurfaces for endoscopy
Endoscopic imaging offers the possibility of imaging living tissue non-invasively, surpassing conventional imaging techniques limited by absorption and scattering. Their recent miniaturization has enabled them to be used not only to probe hollow organs, but also dense living environments such as the brain.
Although good performances in terms of imaging resolution and depth of field have been achieved on endoscopic systems, there are still
unresolved issues that limit the use of miniaturized endoscopes for clinical applications. Among these are two major limitations :
i) the field of view probed by the endoscope inside living tissue is small, due to the limitation on the displacement of the endoscopic
fiber to remain non-invasive.
ii) the problem of transmission properties through the endoscopic fiber which can alter the waveform at the fiber output (e.g. phase and
group delays within the fiber).
In this project, we aim to explore the possibility of integrating metasurfaces inside the endoscope to resolve these limitations.
Metasurfaces are planar optical components made up of arrangements of sub-wavelength sized structures capable of controlling the properties of reflected and transmitted light.
This project is being carried out in collaboration with Hervé Rigneault of the Fresnel Institute.
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