A new approach to quantum light emitters generates a stream of circularly polarized single photons, or particles of light, that may be useful for a range of quantum information and communication applications. A Los Alamos National Laboratory team stacked two different atomically thin materials to realize this chiral quantum light source.
"Our research shows that it is possible for a monolayer semiconductor to emit circularly polarized light without the help of an external"This effect has only been achieved before with
The indentations are approximately 400 nanometers in diameter, so over 200 of such indents can easily be fit across the width of a human hair. The nanoindentation also disrupts the typical magnetic properties of the underlying nickel phosphorus trisulfide crystal, creating a local magnetic moment pointing up out of the materials. ThatTo provide experimental confirmation of this mechanism, the team first performed high magnetic field optical spectroscopy experiments in collaboration with National High Magnetic Field Laboratory's Pulsed Field Facility at Los Alamos.
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