Abstract
This article aims to study how a thermoelastic medium having a bipolar nature is impacted by diffusion. It employs an analytical method called normal mode analysis to derive the formula for required physical quantities. The paper utilizes Green-Naghdi theory (G-N III) along with the three-phase-lag (3PHL) model to solve the existing problem. The comparisons are established graphically for different values of the phase-lag times, the presence and absence of diffusion, and the time parameter with respect to Green-Naghdi theory and the 3PHL model.