Focusing of Surface Plasmon Wave for Small‐Molecule Sensing

Miniaturized manipulation and control of surface plasmon waves have long been a desirable goal. However, conventional nanomethods high losses uncontrollable outcomes, which limit their utility in light–matter interaction. To overcome these challenges, method for achieving directional propagation concentration using nanostructures is proposed. By focusing the transmission on tip nanotriangle, power light enhanced by an order magnitude. This design can be applied to sensing small molecules, both living nonliving. It believed that this approach used realize real‐time, integrated biosensing miniaturized chips.