期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 29, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/29/1/015601
关键词
intrinsic Josephson junctions; microstrip antennas; terahertz radiation; high temperature superconductor; equilateral triangular wave functions
资金
- UCF RAMP program
- JSPS Research Fellowship for young scientists
- CREST-JST (Japan Science and Technology Agency)
- WPI (World Premier International Research Center Initiative)-MANA (Materials Nanoarchitectonics) project (NIMS)
- Grants-in-Aid for Scientific Research [15K04688, 14J03097, 15H01996] Funding Source: KAKEN
We study the transverse magnetic (TM) electromagnetic cavity mode wave functions for an ideal equilateral triangular microstrip antenna (MSA) exhibiting C-3v point group symmetry. When the C-3v operations are imposed upon the antenna, the TM(m,n) modes with wave vectors alpha root m(2)+ nm+ n(2) are much less dense than commonly thought. The R-3 operations restrict the integral n and m to satisfy vertical bar m-n vertical bar = 3p, where p >= 0 and p >= 1 for the modes even and odd under reflections about the three mirror planes, respectively. We calculate the forms of representative wave functions and the angular dependence of the output power when these modes are excited by the uniform and non-uniform ac Josephson current sources in thin, ideally equilateral triangular MSAs employing the intrinsic Josephson junctions in the high transition temperature T-c superconductor Bi2Sr2CaCu2O8+delta, and fit the emissions data from an earlier sample for which the C-3v symmetry was apparently broken.
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