Optical control is a research area that focuses on using light (optical signals) to manipulate and control the behavior of various systems or materials. This can include controlling the properties of materials, such as its electrical conductivity or mechanical properties, or manipulating the movement of particles or cells. Optical control can involve techniques such as optogenetics, which use light to control genetically modified cells, or laser-based methods to manipulate and control the behavior of materials at a microscopic or even nanoscale level. This field has applications in a wide range of disciplines, including biology, materials science, physics, and engineering.