Accession Number : ADD015907

Title :   Polarized Optical Emission Due to Decay or Recombination of Spin-Polarized Injected Carriers.

Descriptive Note : Patent Application, Filed 29 Jun 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Jonker, Berend T

Report Date : 29 Jun 1993

Pagination or Media Count : 16

Abstract : 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.

Descriptors :   *EMISSION, *LIGHT EMITTING DIODES, *PATENT APPLICATIONS, *SPIN STATES, *POLARIZATION, *OPTICAL SWITCHING, *SEMICONDUCTORS, BIAS, ELECTRONS, LAYERS, MAGNETIC MOMENTS, REGIONS, DECAY, CIRCULAR, MODULATION, FERROMAGNETISM, ELECTRICAL PROPERTIES, HOLES(ELECTRON DEFICIENCIES), STRUCTURES

Subject Categories : Electrical and Electronic Equipment
      Optics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE