![Magnesium Fluoride Microresonator thumbnail](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/imageoftheweek/2019/19-04-08.jpg?t=638430740908644188)
Magnesium Fluoride Microresonator
Third-harmonic generation in magnesium fluoride microresonator. This is the top-view image of the microresonator generating green color when pumped with 1582-nm light.
—Noel Lito B. Sayson, Ph.D student, University of Auckland, New Zealand