Okay this one is pretty friggen cool. It turns out, that under the right conditions, you can get a powerful magnetic field from light. It was thought that you could ignore the magnetic field from light in all cases because it is so weak compared to light's electric field. Putting light in glass at a very high intensity makes the right conditions.
To make this work, they can get 10% efficiency using a glass lens and a glass fiber optic cable. Now the trick is to make this effect work at lower light intensities so that you can use sunlight as a source. Glass is a lot cheaper than silicon, so hopefully, they can get this all to work.
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