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Title: Emission of coherent THz radiation from superconductors
Authors: Özyüzer, Lütfi
Koshelev, A. E.
Kurter, Cihan
Gopalsami, N.
Li, Q.
Tachiki, M.
Kadowaki, K.
Yamamoto, T.
Minami, H.
Yamaguchi, H.
Tachiki, T.
Gray, Kenneth E.
Kwok, W. K.
Welp, U.
Keywords: Electromagnetic radiation
High temperature procedures
Electromagnetic field
Thermal conductivity
Issue Date: Nov-2007
Publisher: American Association for the Advancement of Science
Source: Özyüzer, L., Koshelev, A. E., Kurter, C., Gopalsami, N., Li, Q., Tachiki, M., Kadowaki, K., Yamamoto, T., Minami, H., Yamaguchi, H., Tachiki, T., Gray, K. E., Kwok, W. K., and Welp, U. (2007). Emission of coherent THz radiation from superconductors. Science, 318(5854), 1291-1293. doi:10.1126/science.1149802
Abstract: Compact solid-state sources of terahertz (THz) radiation are being sought for sensing, imaging, and spectroscopy applications across the physical and biological sciences. We demonstrate that coherent continuous-wave THz radiation of sizable power can be extracted from intrinsic Josephson junctions in the layered high-temperature superconductor Bi2Sr2CaCu 2O8. In analogy to a laser cavity, the excitation of an electromagnetic cavity resonance inside the sample generates a macroscopic coherent state in which a large number of junctions are synchronized to oscillate in phase. The emission power is found to increase as the square of the number of junctions reaching values of 0.5 microwatt at frequencies up to 0.85 THz, and persists up to ∼50 kelvin. These results should stimulate the development of superconducting compact sources of THz radiation.
ISSN: 0036-8075
Appears in Collections:Physics / Fizik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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