high-purity metal / energy gap frequency / sub-micron micromachining technology / frequency applications / detection applications / speed telecommunication technology / higher energy gaps / electronic device / nanometer-scale interface control technology / mixer chip / rapid heterodyne detector device / metal niobium / conventional manufacturing process / e - s / produced mixer chip / using the conventional manufacturing process / /
2-3 Research on Superconductive Oscillators and Detectors at Terahertz Frequency Regions WANG Zhen, KAWAKAMI Akira, and UZAWA Yoshinori Development of generating and detecting technology in the THz frequency region is a