Quantum Photonics for Environmental Sensing of Micro/Nano/Bio particles in Drinking Water

I present a novel quantum photonic approach to environmental sensing that uses biocavity laser emission, spectroscopy, and microscopy for direct detection and analysis of potentially harmful micro-, nano-, and bio-particles increasingly found in drinking water. The method employs a micro-optical resonator in which individual particles—static or flowing—including microplastics, minerals, harmful microorganisms, and engineered nanoparticles known to cross the blood–brain barrier, perturb the laser field to produce distinct spatial, spectral, and temporal signatures. These perturbations reveal quantum-level fluctuations in intensity and lasing mode structure that encode information about particle size, refractive index, composition, and dynamic motion within the cavity. The resulting high sensitivity and selectivity offer practical new means to identify and quantify complex mixtures of contaminants continuously in real time. Results are compared with conventional UV micro-fluorescence, laser-scanning microscopy, and flow cytometry for validation. The results demonstrate how biocavity laser spectroscopy can employ quantum light-particle interactions to elevate environmental sensing to a new level of precision and insight.