Two-dimensional quantum-mechanical confinement of electrons in LED by strong magnetic fields

Two-dimensional quantum-mechanical confinement of electrons in a GaAlAs light emitting diode (LED) is realized by applying strong magnetic fields, in which electrons can move freely only in the direction of magnetic fields, and the dimensionality of the free carrier motion is reduced from three to one. With this confinement of electrons, considerable suppression of half-value width of the spectrum broadening from 80 to 60 Å at 80 K in the LED is observed. The systematic shift of the emission peak toward shorter wavelength is also observed in accordance with the theory, which takes into account the Landau level broadening due to finite electron mobility.