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VOLUME 89 | ISSUE 5 | PAGE 291
Collective responses of Bi-2212 stacked junction to 100 GHz microwave radiation under magnetic field oriented along the c-axis
V. N. Pavlenko+, Yu. I. Latyshev+, J. Chen*, M. B. Gaifullin^\nabla, A. Irzhak^\square, S.-J. Kim^\triangle, P. H. Wu*

+Institute of Radio-Engineering and Electronics RAS, 125009 Moscow, Russia
*Nanjing University RISE, 210093 Nanjing, China
^\nablaLoughborough University, LE11 3TU Loughborough, United Kingdom
^\squareMoscow Institute of Steel and Alloys, 119049 Moscow, Russia
^\triangleCheju National University, 690-756 Jeju-do, Korea


PACS: 74.25.Qt, 74.72.Hs, 74.78.Fk, 85.25.Pb
Abstract
We studied a response of Bi-2212 mesa type structures to 100 GHz microwave radiation. We found that applying magnetic field of about 0.1 T across the layers enables to observe collective Shapiro step response corresponding to a synchronization of all 50 intrinsic Josephson junctions (IJJ) of the mesa. At high microwave power we observed up to 10^{\rm th} harmonics of the fundamental Shapiro step. Besides, we found microwave induced flux-flow step position of which is proportional to the square root of microwave power and that can exceed at high enough powers 1 THz operating frequency of IJJ oscillations.


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