To be fair, there's actually a lot of interesting work happening with this technology, and it is fairly recent. There's a group at Tufts using these devices for

To be fair, there's actually a lot of interesting work happening with this technology, and it is fairly recent. There's a group at Tufts using these devices for ultra-cheap non-invasive real time brain scanning (it turns out that human skulls are mostly transparent to light at these frequencies). My spouse briefly worked with them.