Microresonators

Microresonators are tiny structures, often just micrometers in size, designed to trap and amplify light through resonance. By carefully shaping and sizing these structures, light waves circulate, build up in intensity, and interact efficiently with materials or signals. They are used in various applications like filtering specific wavelengths in telecommunications, sensing biological or chemical substances, and generating new light frequencies (frequency combs). Despite their small size, microresonators leverage the physics of resonance—similar to swinging at just the right timing—to achieve precise control and enhancement of light signals.