Laser-Induced Breakdown
Bright speckles intercepted on a piece of white paper after an azimuthally polarized femtosecond laser beam is focused into a glass slide. The demonstration shows the existence of laser-induced breakdown in glass. (Photo captured in by an iPhone 6.)
[Honorable Mention, OPN 2020 Photo Contest]
—Zhijun Xu, College of Science, Zhejiang University of Technology, Zhejiang, China