A bio-inspired model for bidirectional polarisation detection
This study investigated a novel polarisation detection model based on the microstructure of rhabdom
in mantis shrimp eyes, in which a single unit can detect two directions of orthogonal polarisation.
The bionic model incorporated multi-layered orthogonal Si wire grids, and the finite-difference
time-domain method was used to simulate light absorption. A single-layer Si wire grid was simulated
to study the effects of thickness and duty cycle on extinction ratios. A multi-layer orthogonal wire
grid was simulated to study the effects of distance between adjacent layers. The simulations
revealed that the bionic model can achieve orthogonal polarisation detection. Additionally, for 600
coupled layers, the extinction ratios in both directions were greater than 60, and light absorption
in the absorptive directions exceeded 96%.
Source: Bioinspiration and Biomimetics - Category: Science Authors: Qifan Zhu, Yuegang Fu and Zhiying Liu Source Type: research