Solid state cyclotron laser

Details Solid state cyclotron laser Solid state cyclotron laser

1985-12-20

1988-02-02

Davie, James W.

Coherent light generators

Having an applied magnetic field

357 17, 357 27, 372 4, 372 20, 372 44, H01S 300, H01S 319, H01L 3300, H01L 2722

Patent

active

047232501

ABSTRACT:
A solid state cyclotron laser device generate coherent electromagnetic radiation. A semiconductor configuration comprises an emitter region and a collector region separated by a base region and barrier layers on each side of the base. The semiconductor configuration is biased such that electrons enter the base region from the emitter region as hot electrons. A magnetic field applied by an external source to the base region causes the hot electrons to gyrate and quantize into Landau levels. An optical resonance cavity produces standing wave modes which stimulate the electrons to move from higher to lower Landau levels to generate conherent radiation. Electrons with decreased energy are removed at the collector in order to maintain the population inversion. The device is tunable by adjusting the magnetic field.

REFERENCES:
patent: 3986194 (1976-10-01), Masumoto et al.
patent: 4376917 (1983-03-01), Ganguly et al.
Gornik, "Tunable for Infrared Sources Based on Landau Level Transitions", Optics and Laser Technology, Jun. 1975, vol. 7, No. 3, pp. 121-126.
J. Schneider, "Stimulated Emission of Radiation by Relativistic Electrons in a Magnetic Field", Phys. Rev. Lett., 2, 504, (1959).
B. Lax, "Cyclotron Resonance and Impurity Levels in Semiconductors", Published in Quantum Electronics, Columbia Univ., Press, N.Y., (1960), p. 428.
Heiblum, et al., "Direct Observation of Ballistic Transport in GaAs", Phys. Rev. Lett. 55, 2200, (1985).

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