Towards wireless addressable optoelectronic implants for large-scale optogenetics

Hesam Sadeghi Gougheri, Yufei Jia, Joe Chen, Iam-choon Khoo, Noel Christopher Giebink, Mehdi Kiani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This paper presents the concept and some preliminary results of a millimeter-scale wireless addressable optoelectronic implant (WAOI), a network of which can be distributed over the brain for large-scale optogenetics. The WAOI contains a wireless receiver (base), which establishes wireless power transfer and data communication with an external unit, connected to an optoelectronic shank, which integrates liquid crystal-based silicon photonic on CMOS electronics for switchable optical emission. The liquid crystal-switched waveguide can provide light switching of a single light source (e.g. laser diode), which is integrated on the base, along the shank, thus minimizing heat generation within brain parenchyma. To reduce interconnect wiring between the base and the shank, a power-line communication technique is presented for data transfer from the base to the shank. Simplified prototypes of the base and shank ASICs were designed and developed in 0.35-µm 2P4M CMOS process. The simulation results of these ASICs for addressing of 16 stimulation pixels on the shank are presented. Moreover, a macroscale example of liquid crystal-switched waveguide was fabricated and measured to demonstrate basic liquid crystal switch operation.

Original languageEnglish (US)
Title of host publication2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728103976
DOIs
StatePublished - Jan 1 2019
Event2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Sapporo, Japan
Duration: May 26 2019May 29 2019

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2019-May
ISSN (Print)0271-4310

Conference

Conference2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019
CountryJapan
CitySapporo
Period5/26/195/29/19

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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