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Silicon optrode array with monolithically integrated SU-8 waveguide and single LED light source
DC Field | Value | Language |
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dc.contributor.author | Ryu, Daeho | - |
dc.contributor.author | Lee, Youjin | - |
dc.contributor.author | Lee, Yongseung | - |
dc.contributor.author | Lee, Yena | - |
dc.contributor.author | Hwang, Seoyoung | - |
dc.contributor.author | Kim, Yong-Kweon | - |
dc.contributor.author | Jun, Sang Beom | - |
dc.contributor.author | Lee, Hyang Woon | - |
dc.contributor.author | Ji, Chang-Hyeon | - |
dc.date.accessioned | 2022-10-05T04:22:02Z | - |
dc.date.available | 2022-10-05T04:22:02Z | - |
dc.date.created | 2022-08-16 | - |
dc.date.issued | 2022-08 | - |
dc.identifier.citation | Journal of Neural Engineering, Vol.19 No.4, p. 046013 | - |
dc.identifier.issn | 1741-2560 | - |
dc.identifier.uri | https://hdl.handle.net/10371/185446 | - |
dc.description.abstract | Objective. This paper presents a conventional light emitting diode (LED) and polymer waveguide coupled silicon optrode array. Approach. Unique lens design at the waveguide inlet enables a high light coupling efficiency with a single LED light source, and provides small power consumption compatible with a wireless optogenetic neuromodulation system. To increase the light intensity at the waveguide tip, a lensed waveguide is fabricated with epoxy-based photoresist SU-8, which has a plano-convex lens shape at the waveguide inlet to focus the light in the horizontal direction. In addition, a cylindrical lens is assembled in front of the waveguide inlet to focus the source light in the vertical direction. Main results. The glass cylindrical lens and SU-8 plano-convex lens increased the light coupling efficiency by 6.7 dB and 6.6 dB, respectively. The fabricated 1 x 4 array of optrodes is assembled with a single LED with 465 nm wavelength, which produces a light intensity of approximately 2.7 mW mm(-2) at the SU-8 waveguide outlet when 50 mA input current is applied to the LED. Each optrode has four recording electrodes at the SU-8 waveguide outlet. The average impedance of the iridium oxide (IrO (x) ) electroplated recording electrodes is 43.6 k omega. Significance. In-vivo experiment at the hippocampus region CA1 and CA2 demonstrated the capability of optical stimulation and neural signal recording through the LED and SU-8 waveguide coupled silicon optrode array. | - |
dc.language | 영어 | - |
dc.publisher | Institute of Physics Publishing | - |
dc.title | Silicon optrode array with monolithically integrated SU-8 waveguide and single LED light source | - |
dc.type | Article | - |
dc.identifier.doi | 10.1088/1741-2552/ac7f5f | - |
dc.citation.journaltitle | Journal of Neural Engineering | - |
dc.identifier.wosid | 000827834200001 | - |
dc.identifier.scopusid | 2-s2.0-85134721018 | - |
dc.citation.number | 4 | - |
dc.citation.startpage | 046013 | - |
dc.citation.volume | 19 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Kim, Yong-Kweon | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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