I don't know about Apple. But I believe Samsung is basing their version on some of the tech from this article: https://advances.sciencemag.org/content/6/4/eaay5

I don't know about Apple. But I believe Samsung is basing their version on some of the tech from this article: https://advances.sciencemag.org/content/6/4/eaay5206 https://advances.sciencemag.org/content/6/4/eaay5206