Infrared laser detection by antenna-coupled-point-contact Schottky diodes
Abstract
The responsivity of antenna-coupled point-contact Schottky diodes to CO2 laesr radiation was studied experimentally. A very clear antenna pattern was obtained for 10.6-micron radiation and found to agree with theory based on the traveling-wave antenna. The bias-voltage dependence of the detected voltage agreed with the results calculated by using measured (dI/dV)-V and (d2I/dV2)-V characteristics. It is seen from this that the fabricated devices respond to the frequency of a CO2 laser as a square-law detector (resulting from nonlinearity of the I-V characteristic at CO2-laser frequency) and detect the laser signal by rectification.
- Publication:
-
Electronics Communications of Japan
- Pub Date:
- June 1984
- Bibcode:
- 1984JElCo..67..114I
- Keywords:
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- Antenna Radiation Patterns;
- Infrared Detectors;
- Infrared Lasers;
- Laser Applications;
- Schottky Diodes;
- Volt-Ampere Characteristics;
- Carbon Dioxide Lasers;
- Contact Potentials;
- Lasers and Masers