Schematic diagram of the rainbow trapping metasurface used in lung cancer diagnosis (left) and trapped “rainbow” localization images for spectral analysis observed by a 4× objective lens (right). Credit: Qiaoqiang Gan The global spread of COVID-19 has highlighted the importance of rapid, accurate, and easy sensing of viruses and ...
View more: Optical biosensing through a toy microscope over a surface 'rainbow' chip