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15 Jun 1968

Volume 12, Issue 12, pp. 401-408


FREQUENCY MIXING IN THE INFRARED AND FAR‐INFRARED USING A METAL‐TO‐METAL POINT CONTACT DIODE

L. O. Hocker, D. R. Sokoloff, V. Daneu, A. Szoke, and A. Javan

Appl. Phys. Lett. 12, 401 (1968); http://dx.doi.org/10.1063/1.1651873 (2 pages) | Cited 70 times

Online Publication Date: 17 October 2003

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Metal‐to‐metal point contact diodes were used to obtain the 54‐GHz beat notes between two adjacent 10.6‐μ CO2 laser transitions. The speed of the diodes in the far‐infrared is at least 1000 GHz. This was tested with a 337‐μ HCN laser.

A UNIVERSAL PLANAR X‐RAY RESONATOR

R. M. J. Cotterill

Appl. Phys. Lett. 12, 403 (1968); http://dx.doi.org/10.1063/1.1651874 (2 pages) | Cited 16 times

Online Publication Date: 17 October 2003

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A planar x‐ray resonator, the tuning of which is exact, can be constructed from a suitable arrangement of an even number of Bragg reflectors, pairs of which are parallel.

LOW FREQUENCY CURRENT FLUCTUATIONS IN A GaAs GUNN DIODE

Koichiro Matsuno

Appl. Phys. Lett. 12, 404 (1968); http://dx.doi.org/10.1063/1.1651875 (2 pages) | Cited 5 times

Online Publication Date: 17 October 2003

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Low frequency noise spectrum and electrical conductivity of a GaAs Gunn diode are presented. Based on these results, we suggest that the observed FM noise spectrum of Gunn oscillators with −9 dB∕octave slope of noise‐to‐carrier ratio may also be due to current fluctuations with l∕f characteristic resulting from electron trapping.

MAGNETIC AND OPTICAL PROPERTIES OF COBALT‐SUBSTITUTED RbNiF3

J. C. Suits, T. R. McGuire, and M. W. Shafer

Appl. Phys. Lett. 12, 406 (1968); http://dx.doi.org/10.1063/1.1651876 (3 pages) | Cited 3 times

Online Publication Date: 17 October 2003

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When nickel is replaced by cobalt in RbNi1☒xCoxF3, the hexagonal structure and the ferrimagnetic order are maintained; however, the easy axis of magnetization at 77°K rotates in a complex manner from perpendicular (x < .07) to parallel to the optic axis (x > .17). In the optical window region at 17,000 cm−1 the bulk absorption remains constant at 5 cm−1 and the Faraday rotation increases to 200 deg∕cm at x = .25.
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