Spin-controlled photon emission in 2D perovskites enables quantum communication
A University of North Carolina at Chapel Hill research team has demonstrated a novel way to encode quantum information directly within the light produced by two-dimensional perovskites – opening a potential path to simpler, more efficient quantum communication systems. The study explores how spin dynamics in two-dimensional organic–inorganic hybrid perovskite (2D-OIHP) quantum wells can generate polarization-encoded photons suitable for secure communication protocols.
Two-dimensional perovskites are well known for their performance in light-emitting and photovoltaic devices, but the UNC team, led by Professor Andrew Moran, has shown they can also act as microscopic light sources whose intrinsic exciton spin behavior defines the polarization of emitted photons. When ultrafast laser pulses excite the material, they generate pairs of bound charge carriers – excitons – whose spins determine the polarization of emitted light.
Source: https://www.spintronics-info.com/spin-controlled-photon-emission-2d-perovskites-enables-quantum-communication
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