Brilliant Iridescence: Ultrasonic Machining for Structural Coloration

At Ping Guo's lab at Northwestern University, ultrasonic modulation cutting transforms metallic surfaces into vibrant works of art. By generating micro/nano-gratings, this innovative technique creates structural coloration, producing iridescent colors through periodic ripples on the surface.

https://pingguo.mech.northwestern.edu/projects/structural_coloration/