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Lanzio V, Lorenzon M, Dhuey S, Pirri CF, Lamberti A, Cabrini S. Scalable nanophotonic neural probes for multicolor and on-demand light delivery in brain tissue. Nanotechnology 2021; 32:265201. [PMID: 33725677 DOI: 10.1088/1361-6528/abef2a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Neural probes arein vivobrain-invasive devices that record and manipulate neural circuits using electricity, light, or drugs. The capability to shine distinct wavelengths and control their respective output locations for activation or deactivation of specific groups of neurons is desirable but remains unachieved. Here, we discuss our probe's capability to deliver two independently controllable wavelengths (450 and 655 nm) in the location(s) of interest using nanophotonic directional couplers and ring resonators. These nanophotonics are scalable to dozens of outputs without significantly increasing the device's lateral dimensions. Furthermore, they are entirely passive and thus do not require electrical input that results in heat generation. Besides, we integrate a high number of electrodes for a simultaneous neural activity readout. Thus, we overcome the challenges associated with multicolor illumination for neural devices by exploiting the capability of miniaturizable, passive probes to deliver two different frequencies in several areas of interest. These devices open the path towards investigating thein vivoelectrical signal propagation under the individual or simultaneous activation or inhibition of distinct brain regions.
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Affiliation(s)
- V Lanzio
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
- Department of Applied Science and Technology, Politecnico di Torino, Torino, I-10129, Italy
| | - M Lorenzon
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
| | - S Dhuey
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
| | - C F Pirri
- Department of Applied Science and Technology, Politecnico di Torino, Torino, I-10129, Italy
- Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Corso Trento, 21, I-10129 Torino, Italy
| | - A Lamberti
- Department of Applied Science and Technology, Politecnico di Torino, Torino, I-10129, Italy
- Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Corso Trento, 21, I-10129 Torino, Italy
| | - S Cabrini
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
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