Polarized Optical Emission Due to Decay or Recombination of Spin-Polarized Injected Carriers.
Patent Application, Filed 29 Jun 93,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A device for producing circularly polarized optical emission includes a light emitting semiconductor heterostructure, further including at least one semiconducting layer a ferromagnetic contact having a magnetic moment, in electrical contact with a layer of the semiconductor heterostructure and a contact electrically connected to a different region of the semiconductor heterostructure. This light emitting semiconductor heterostructure may be a light emitting diode LED, or some other structure. The ferromagnetic contact injects spin polarized carriers electrons or holes into the semiconducting device, which recombine with their opposing carriers to produce circularly polarized light. A process for producing circularly polarized optical emission includes applying a bias across a light emitting semiconductor heterostructure having a contact with a net magnetic moment, thereby injecting spin polarized carriers into the light emitting semiconductor heterostructure.
- Electrical and Electronic Equipment
- Electricity and Magnetism