Episode 8: Two-beam interferometry experiment characterizes lightsail propulsion

MRS Bulletin Materials News Podcast · May 12, 2025 · 5m

In this podcast episode, MRS Bulletin’s Laura Leay interviews Harry Atwater from the California Institute of Technology about his study on lightsail propulsion in order to understand how the device can be developed to do fly-by space travel riding a beam of laser light. Atwater’s research group made a square prototype device where the researchers incorporated springs at each corner, etched out of a single sheet of silicon nitride, fastening it to the support frame. They tested its behavior in a two-beam interferometry experiment. Their comprehensive analysis provides a thorough understanding…