Near-Field Intra-Body Optical Communication: Leveraging the Power of Bessel Beams

This work explores the use of Bessel beams as a potential solution for near-field optical intra-body communication. Bessel beams possess unique non-diffracting and self-healing properties, making them superior to traditional Gaussian beams in maintaining intensity through complex biological environments in the near-field. In this paper, we propose a system that employs optical nanoantenna arrays to generate Bessel beams at a wavelength of 1550 nm, which falls within the biological transparency window. The system model is described, including its design principles and the corresponding mathematical formulation. Our results compare the propagation characteristics of Bessel and Gaussian beams in intra-body contexts, highlighting the role of near-field effects in ensuring propagation stability and preserving beam integrity at cellular levels.