Abstract
We examine both power and bias current dependence of terahertz (THz) emission properties from YBa2Cu3O7-δ (YBCO) Josephson junctions. The junctions coupled to bow-tie antennas are fabricated by Ar ion milling from YBCO thin films grown on MgO bicrystals. We observe the radiation at bias currents from 0 to 50 mA, laser powers from 0 to 250 mW. The radiation amplitude increases with increasing laser power, and the frequency at which the radiation has a maximum amplitude decreases with increasing laser power. These trends are observed regardless of junction voltage. The results suggest that the voltage of the Josephson junction plays a less important role in the THz radiation excited by a femtosecond laser.
| Original language | English |
|---|---|
| Pages (from-to) | 329-332 |
| Number of pages | 4 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 362 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - Sep 1 2001 |
| Externally published | Yes |
Keywords
- Femtosecond laser pulse
- Josephson junction
- Terahertz radiation
- YBaCuO
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
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Yoshimura, T., Kiwa, T., & Tonouchi, M. (2001). Terahertz emission from YBa2Cu3O7-δ Josephson junctions excited by femtosecond laser. Physica C: Superconductivity and its applications, 362(1-4), 329-332. https://doi.org/10.1016/S0921-4534(01)00698-0