A laser drills a honeycomb of holes through a plate of borosilicate glass, and the finished plate blocks one band of ultrasonic frequencies. The model puts the bandgap at 195 to 214 kHz; measurements on the real plate find 193 to 211 kHz.
A laser drills a honeycomb of holes through a plate of borosilicate glass, and the finished plate blocks one band of ultrasonic frequencies. The model puts the bandgap at 195 to 214 kHz; measurements on the real plate find 193 to 211 kHz.
