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light signal is sent or blocked. “This is the very principle of a transistor”, explains Pimenov.
Left: The light beam (from above) is sent through a special material to which an electromagnetic potential is applied. That way, the polarisation direction can be rotated
“The application of an external voltage determines whether current flows or not, and in our case, the voltage determines whether the light arrives or not.”
The new invention is therefore the optical equivalent of an electrical transistor.