Now MIT scientists have adapted a 19th-century holographic photography technique to develop chameleon-like films that change color when stretched. The method can be easily scaled while preserving nanoscale optical precision. ...
There are several techniques for making such materials, but none of those methods can both control the structure at the small scales required and scale up beyond laboratory settings. ...
Then co-author Benjamin Miller, a graduate student at MIT, discovered an exhibit on holography at the MIT Museum and realized that creating a hologram was similar in some respects to how nature produces structural color. He delved into the history of holography and learned about a late 19th-century color photography technique invented by physicist Gabriel Lippmann. ...
See the full story here: https://arstechnica.com/science/2022/08/mit-scientists-create-color-shifting-films-inspired-by-19th-century-holography/
See the video here: https://cdn.arstechnica.net/wp-content/uploads/2022/08/lippman3.mp4?_=1