Evidence for a Dual-Source Mechanism of Terahertz Radiation from Rectangular Mesas of Single Crystalline Bi2Sr2CaCu2O8+δ Intrinsic Josephson Junctions

The THz radiation emitted from rectangular mesas of single-crystal Bi 2 Sr 2 CaCu 2 O 8+δ was studied using angular distribution measurements and Fourier transform infrared spectroscopy. Unlike the recent theoretical predictions, the results provide strong evidence for a dual-source mechanism in which the uniform and non-uniform parts of the ac-Josephson current act as electric and magnetic current sources, respectively. The latter synchronizes with cavity modes of the mesa with integral harmonics of the fundamental radiation.

[1]  N. Pedersen,et al.  THz Generation Using Fluxon Dynamics in High Temperature Superconductors , 2009, IEEE Transactions on Applied Superconductivity.

[2]  Kazuo Kadowaki,et al.  Growth and properties of Bi2Sr2(Ca, Y)Cu2O8+δ single crystals , 1994 .

[3]  A. E. Koshelev,et al.  Resonant electromagnetic emission from intrinsic Josephson-junction stacks with laterally modulated Josephson critical current , 2007, 0708.3269.

[4]  W. Kwok,et al.  Emission of Coherent THz Radiation from Superconductors , 2007, Science.

[5]  M. Machida,et al.  Electromagnetic waves in single- and multi-Josephson junctions , 2008 .

[6]  Miyamoto,et al.  Optical evidence for strong anisotropy in the normal and superconducting states in Bi2Sr2CaCu2O8+z. , 1993, Physical review. B, Condensed matter.

[7]  Xiao Hu,et al.  Three-dimensional phase-kink state in a thick stack of Josephson junctions and terahertz radiation , 2008 .

[8]  A. E. Koshelev,et al.  Alternating dynamic state self-generated by internal resonance in stacks of intrinsic Josephson junctions , 2008 .

[9]  W. Kwok,et al.  Direct observation of tetrahertz electromagnetic waves emitted from intrinsic Josephson junctions in single crystalline Bi2Sr2CaCu2O8+δ , 2008 .

[10]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .

[11]  M. Leone.  The radiation of a rectangular power-bus structure at multiple cavity-mode resonances , 2003 .

[12]  A. Koshelev,et al.  Radiation due to Josephson oscillations in layered superconductors. , 2007, Physical review letters.

[13]  Xiao Hu,et al.  Computer simulation on terahertz emission from intrinsic Josephson junctions of high- T c superconductors , 2007, 0709.0580.

[14]  Michael S. Shur,et al.  Terahertz sensing technology , 2009, GLSVLSI '09.

[15]  M. Machida,et al.  In-phase electrodynamics and terahertz wave emission in extended intrinsic Josephson junctions , 2009 .

[16]  T. Koyama,et al.  Mechanism of terahertz electromagnetic wave emission from intrinsic Josephson junctions. , 2008, Physical review letters.

[17]  Xiao Hu,et al.  Possible dynamic states in inductively coupled intrinsic Josephson junctions of layered high-Tc superconductors. , 2008, Physical review letters.

[18]  K. Kadowaki,et al.  Crystallinity improvement of Bi2Sr2CaCu2O8+δ single crystal by TSFZ method , 1997 .