When Geometry Matters: Gradient-Wall Microresonators Enable Large-Scale Optical Trapping | Newswise
[ad_1] Newswise — Near-field optical trapping has transformed particle manipulation in biology, chemistry, and nanotechnology, enabling contact-free control of objects ranging from nanoparticles to living cells. However, most existing whispering-gallery-mode and waveguide-based platforms rely on evanescent fields that penetrate only about 100 nanometers into the surrounding medium. This shallow interaction region restricts trapping efficiency and […]