Far-infrared electromagnetic wave generator

Details Far-infrared electromagnetic wave generator Far-infrared electromagnetic wave generator

1983-08-09

1986-02-18

Sikes, William L.

Coherent light generators

Long wavelength

372 44, H01S 330

Patent

active

045717273

ABSTRACT:
A far-infrared electromagnetic wave generator comprises a semiconductor containing at least one impurity which has an energy difference, close to a quantum energy of optical phonon, between its transition levels; a resonator having two reflectors for effecting positive feedback of an electromagnetic wave corresponding to the quantum energy; and means for applying an electric current across the semiconductor. The semiconductor may have p-i, n-i, p-i-n, p-n, or n-p.sup.- junction. One of the reflectors of the resonator may have a diffraction grating so that the wavelength of the electromagnetic wave to be generated can be varied by adjusting an angle of the diffraction grating.

REFERENCES:
patent: 3611180 (1971-10-01), Lasser
patent: 4286231 (1981-08-01), Makita
Nakamura et al., "Photoconductivity Associated with Auger Recombination of Excitons Bound to Neutral Donors in Te-Doped Gallium Phosphide"; Jou. of Physical Soc. of Japan, vol. 34, No. 3, Mar. 1973.
Edmonds et al., "Spectral Tuning and Mode Control in GaAs Injection Lasers"; IBM Tech. Disc. Bull., vol. 12, No. 11, Apr. 1970.

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