4. Bio-Inspired Innovations in Laser Diagnostics

The mantis shrimp possesses one of the most advanced visual systems known in nature. It can detect linear and circular polarized light as well as ultraviolet radiation. Its compound eyes contain up to 16 types of photoreceptor cells, compared to just 3 in humans. This polarization sensitivity allows the shrimp to detect subtle variations in surface structure and hidden prey or predators in murky waters.

Engineers and physicists have mimicked this capability to develop polarization-sensitive optical devices, particularly in cancer diagnostics. Tumor tissues often scatter and polarize light differently than healthy tissues due to variations in cellular alignment and density. Inspired by the mantis shrimp's eye structure, researchers have created compact, polarization-based imaging sensors capable of detecting early-stage cancers with improved contrast and specificity (Pang et al., 2016; Zafar et al., 2021). These sensors can be integrated into endoscopes or handheld diagnostic tools, allowing non-invasive examination of tissues in clinical settings.