Terahertz imaging with a direct detector based on superconducting tunnel junctions

We demonstrated terahertz imaging using a direct detector based on niobium superconducting tunnel junctions (STJs). The detector is composed of linearly distributed junctions placed on a superconducting microstrip line and is integrated on two wings of a log-periodic antenna. We succeeded nondestruc...

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Bibliographic Details
Published in:Applied physics letters 2006-05, Vol.88 (20), p.203503-203503-3
Main Authors: Ariyoshi, S., Otani, C., Dobroiu, A., Sato, H., Kawase, K., Shimizu, H. M., Taino, T., Matsuo, H.
Format: Article
Language:English
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Summary:We demonstrated terahertz imaging using a direct detector based on niobium superconducting tunnel junctions (STJs). The detector is composed of linearly distributed junctions placed on a superconducting microstrip line and is integrated on two wings of a log-periodic antenna. We succeeded nondestructive imaging for an integrated-circuit card and dry material using the detector around its sensitivity peak ( ∼ 0.66 THz ) . The dynamic range was measured to be higher than 4 × 10 7 ( 76 dB ) . Thus, the STJ detector is applicable to high-sensitivity and high-speed terahertz imaging for various nondestructive inspection applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2204842