Cavity mode enhancement of terahertz emission from equilateral triangular microstrip antennas of the high-Tc superconductor Bi2Sr2CaCu2O8+δ
Cavity mode enhancement of terahertz emission from equilateral triangular microstrip antennas of the high-Tc superconductor Bi2Sr2CaCu2O8+δ
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DOI：
10.1088/0953-8984/29/1/015601
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发表时间：
2017-01-11
影响因子：
2.7
通讯作者：
Klemm, Richard A.
中科院分区：
文献类型：
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作者：
Cerkoney, Daniel P.;Reid, Candy;Klemm, Richard A.
我们研究了具有 C-3v 点群对称性的理想等边三角形微带天线 (MSA) 的横磁 (TM) 电磁腔模波函数。当对天线施加 C-3v 操作时，波矢 α 根 m(2)+ nm+ n(2) 的 TM(m,n) 模式的密度远低于通常认为的。 R-3 运算限制积分 n 和 m 以满足垂直条 m-n 垂直条 = 3p，其中分别对于三个镜面反射下的偶模和奇模而言 p >= 0 和 p >= 1。我们计算了当这些模式被均匀和非均匀交流约瑟夫森电流源激发时，在薄的、理想的等边三角形MSA中，采用高转变温度T-c超导体Bi2Sr2CaCu2O8+delta中的固有约瑟夫森结，计算了代表性波函数的形式和输出功率的角度依赖性，并拟合了来自早期样品的发射数据，该样品的C-3v对称性明显被破坏。
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.