Abstract
A low-temperature-grown GaAs (LT-GaAs) photoconductive switch has been utilized as a photomixer in the sub-terahertz (sub-THz) region. The usefulness of the switch has been demonstrated by detecting the radiated sub-THz wave with a high-TC Josephson junction detector consisting a series of nine junctions and a gold-coated log-periodic antenna. The sub-THz waves are radiated from the photoconductive switch by introducing the optical heterodyne signal of two semiconductor lasers. Although the radiation power of the photoconductive switch is three orders of magnitude lower than a conventional photodiode, the sub-THz waves from the switch were successfully observed in the difference voltage response of the junctions. This result suggests that the LT-GaAs switch can be used as the photomixer in the optical-microwave converter for superconductive electronics. We have also studied the properties of a radiated sub-THz frequency spectrum using a Martin-Puplett interferometer.
Original language | English |
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Pages (from-to) | 1540-1543 |
Number of pages | 4 |
Journal | Superconductor Science and Technology |
Volume | 16 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 1 2003 |
Externally published | Yes |
Event | ISEC 2003, International Superconducting Electronics Conference - Sydney,NSW, Australia Duration: Jul 7 2003 → Jul 11 2003 |
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry