• 文献标题:   Graphene coated dielectric resonator antenna for modeling the photoreceptors at visible spectrum
  • 文献类型:   Article
  • 作  者:   NOROOZOLIAEI M, ESFAHANI HR, ABRISHAMIAN MS
  • 作者关键词:   dielectric resonator antenna, electromagnetic model, graphene, photoreceptor, retina
  • 出版物名称:   HELIYON
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   2
  • DOI:   10.1016/j.heliyon.2022.e09611 EA JUN 2022
  • 出版年:   2022

▎ 摘  要

The absorption of light is very important task for retina photoreceptors. Graphene is an energy harvesting material and one of the best models for the electromagnetic wave absorption and its conversion into signals. In this paper, an electromagnetic modeling of human retinal photoreceptors has been presented based on graphene coated material as a receiver antenna. The proposed electromagnetic model based on dielectric resonator antenna (DRA) is being analyzed for retina photoreceptors of human eye (cones and rods) by Finite Integral Method (FIM) collaborated with CST MWS. The results show that the model is good for vision spectrum with a proper field enhancement in cone photoreceptor due to its sensitivity to light. The results indicate proper S-11 (return loss below -10 dB) with invaluable resonances in a wide range of frequencies from 405 THz to 790 THz (vision spectrum), suitable S-21 (insertion loss 3-dB bandwidth), very good field distribution for flowing the power within desired radiation characteristics. The drawbacks of conventional model (no coating) have been resolved by presenting this one at blue spectrum specifically. Finally, mfERG clinical and experimental results show that this model can stimulate the electrochemical voltages and currents in photoreceptor cells.