Work

Descanned fast light targeting (deFLiT) two-photon optogenetics

Year: 2023

Type: article

Abstract: Two-photon light-targeting optogenetics allows controlling selected subsets of neurons with near single-cell resolution and high temporal precision. To push forward this approach, we recently proposed a fast light-targeting strategy (FLiT) to rapidly scan multiple holograms tiled on a spatial light modulator (SLM). This allowed generating sub-ms timely-controlled switch of light patterns enabling to reduce the power budget for multi-target excitation and increase the temporal precision for relative spike tuning in a circuit. Here, we modified the optical design of FLiT by including a de-scan unit (deFLiT) to keep the holographic illumination centered at the middle of the objective pupil independently of the position of the tiled hologram on the SLM. This enables enlarging the number of usable holograms and reaching extended on-axis excitation volumes, and therefore increasing even further the power gain and temporal precision of conventional FLiT.

Source: Biomedical Optics Express

DOI: 10.1364/boe.499445

Authors: Cecile Telliez, Vincent De Sars, Valentina Emiliani, Emiliano Ronzitti

Institutions: Centre National de la Recherche Scientifique, Institut de la Vision, Inserm, Sorbonne Université

Language: English

Topic: Photoreceptor and optogenetics research

Subfield: Cellular and Molecular Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: gold

Estimated APC paid: $1,913