Implantable Photonic Neural Probes with Out-of-Plane Focusing Grating Emitters
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917080385716224 |
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| author | Xue, Tianyuan Stalmashonak, Andrei Chen, Fu-Der Ding, Peisheng Luo, Xianshu Chua, Hongyao Lo, Guo-Qiang Sacher, Wesley D. Poon, Joyce K. S. |
| author_facet | Xue, Tianyuan Stalmashonak, Andrei Chen, Fu-Der Ding, Peisheng Luo, Xianshu Chua, Hongyao Lo, Guo-Qiang Sacher, Wesley D. Poon, Joyce K. S. |
| contents | We have designed, fabricated, and characterized implantable silicon neural probes with nanophotonic grating emitters that focus the emitted light at a specified distance above the surface of the probe for spatially precise optogenetic targeting of neurons. Using the holographic principle, we designed gratings for wavelengths of 488 and 594 nm, targeting the excitation spectra of the optogenetic actuators Channelrhodopsin-2 and Chrimson, respectively. The measured optical emission pattern of these emitters in non-scattering medium and tissue matched well with simulations. To our knowledge, this is the first report of focused spots with the size scale of a neuron soma in brain tissue formed from implantable neural probes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_04525 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Implantable Photonic Neural Probes with Out-of-Plane Focusing Grating Emitters Xue, Tianyuan Stalmashonak, Andrei Chen, Fu-Der Ding, Peisheng Luo, Xianshu Chua, Hongyao Lo, Guo-Qiang Sacher, Wesley D. Poon, Joyce K. S. Optics We have designed, fabricated, and characterized implantable silicon neural probes with nanophotonic grating emitters that focus the emitted light at a specified distance above the surface of the probe for spatially precise optogenetic targeting of neurons. Using the holographic principle, we designed gratings for wavelengths of 488 and 594 nm, targeting the excitation spectra of the optogenetic actuators Channelrhodopsin-2 and Chrimson, respectively. The measured optical emission pattern of these emitters in non-scattering medium and tissue matched well with simulations. To our knowledge, this is the first report of focused spots with the size scale of a neuron soma in brain tissue formed from implantable neural probes. |
| title | Implantable Photonic Neural Probes with Out-of-Plane Focusing Grating Emitters |
| topic | Optics |
| url | https://arxiv.org/abs/2401.04525 |