Channel Impulse Analysis of Light Propagation for Point-to-Point Nano Communications through Cortical Neurons

Wirdatmadja, Stefanus and Jornet, Josep Miquel and Koucheryavy, Yevgeni and Balasubramaniam, Sasitharan (2020) Channel Impulse Analysis of Light Propagation for Point-to-Point Nano Communications through Cortical Neurons. IEEE Transactions on Communications, 68 (11). pp. 7111-7122. ISSN 0090-6778

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Recent Brain-Machine Interfaces have moved towards miniature devices that can be seamlessly integrated into the cortex. In this paper, we propose communication between miniature devices using light. A number of challenges exist using nanoscale light-based communication and this includes diffraction, scattering, and absorption, where these properties result from the tissue medium as well as the cell's geometry. Under these effects, the paper analyses the propagation path loss and geometrical gain, channel impulse and frequency response through a line of neurons with different shapes. Our study found that the light attenuation depends on the propagation path loss and geometrical gain, while the channel response is highly dependent on the quantity of cells along the path. Additionally, the optical properties of the medium impact the time delay at the receiver and the width and the location of the detectors. Simulations were conducted for cells that are lined horizontally up to a distance of 450μm using light wavelength of 456 nm and different neuron densities (men's neocortex (25924(±15110) /mm3) and women's (27589(±16854) /mm3)). Based on the simulations, we found that spherical cells attenuate approximately 20% of the transmitted power compared to the fusiform and pyramidal cells (35% and 65%, respectively).

Item Type: Article
Additional Information: Funding Information: Manuscript received October 30, 2019; revised April 29, 2020 and July 17, 2020; accepted July 21, 2020. Date of publication July 28, 2020; date of current version November 18, 2020. The work has been supported by Science Foundation Ireland (SFI) FutureNeuro (16/RC/3948) and CONNECT (13/RC/2077) Research Centres, National Science Foundation under Grant CBET-1706050, as well as the Academy of Finland under Grant 284531. The associate editor coordinating the review of this article and approving it for publication was W. Shieh. (Corresponding author: Sasitharan Balasubramaniam.) Stefanus Wirdatmadja and Yevgeni Koucheryavy are with the Department of Electronic and Communication Engineering, Tampere University, 33720 Tampere, Finland (e-mail:; Publisher Copyright: © 1972-2012 IEEE.
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2208
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Date Deposited: 19 Oct 2022 23:02
Last Modified: 07 Jun 2023 18:41

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