'I find it totally amazing that it is possible at all to build these light structures.'
A Ph.D. candidate at has developed an innovative technique for creating the elementary building blocks of a future quantum computer or internet in a more controlled manner, opening up a potential solution to many of the challenges along the road to this long-sought technology.
Sometimes called artificial atoms, quantum dots offer a more controllable way to explore quantum phenomena, making them ideal for the task of emitting single photons from a material. “You can imagine this cavity as two mirrors facing each other,” Steindl said. “Laser light bounces back and forth between them. The quantum dot does not like interacting with light, but the optical cavity makes it more likely because the laser passes the dot many times.”
Separating the photon from the laser is challenging since it is of the same wavelength as the laser, but that can also be addressed according to Steindl.
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