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|Title:||Terahertz wave emission from intrinsic Josephson junctions in high- Tc superconductors||Authors:||Özyüzer, Lütfi
Koshelev, A. E.
Gray, Kenneth E.
Kwok, W. K.
Koval, Yu I.
Müller, Paul H.
|Keywords:||Current voltage characteristics
Ac Josephson effect
Terahertz (THz) waves
Josephson junction devices
|Issue Date:||2009||Publisher:||IOP Publishing Ltd.||Source:||Özyüzer, L., Şimşek, Y., Köseoğlu, H., Türkoğlu, F., Kurter, C., Welp, U., Koshelev, A.E., Gray, K.E., Kwok, W.K., Yamamoto, T., Kadowaki, K., Koval, Y., Wang, H.B., and Müller, P. (2009). Terahertz wave emission from intrinsic Josephson junctions in high- Tc superconductors. Superconductor Science and Technology, 22(11). doi:10.1088/0953-2048/22/11/114009||Abstract:||Recently, we experimentally demonstrated that rectangular mesa structures of intrinsic Josephson junctions (IJJ) in Bi2Sr2CaCu 2O8+d (Bi2212) can be used as a compact solid-state generator of continuous, coherent and polarized terahertz (THz) radiation. In the present work, we will exhibit tall mesas (over 600 junctions) which were fabricated using UV lithography, e-beam lithography with photoresist and e-beam lithography with a Ti selective etching technique. We will present measurements of the c-axis resistance as a function of temperature and of current-voltage characteristics of THz emitting mesas with lateral sizes ranging from 30 × 300 to 100 × 300νm2. Furthermore, we will discuss the dependence of the characteristics of the mesa structures on the oxygen doping level of the Bi2212 crystals. We will also experimentally show that the voltage-frequency relation of the ac Josephson effect has to match the cavity resonance for successful emission.||URI:||http://dx.doi.org/10.1088/0953-2048/22/11/114009
|Appears in Collections:||Physics / Fizik|
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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