Cavity mode enhancement of terahertz emission from equilateral triangular microstrip antennas of the high-Tcsuperconductor Bi2Sr2CaCu2O8 + δ.
We study the transverse magnetic (TM) electromagnetic cavity mode wave functions for an ideal equilateral triangular microstrip antenna (MSA) exhibiting C3vpoint group symmetry. When the C3voperations are imposed upon the antenna, the TM(m,n) modes with wave vectors [Formula: see text] are much less dense than commonly thought. The R3operations restrict the integral n and m to satisfy [Formula: see text], where [Formula: see text] and [Formula: see text] 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 Tcsuperconductor Bi2Sr2CaCu2[Formula: see text], and fit the emissions data from an earlier sample for which the C3vsymmetry was apparently broken.
Department of Physics, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816-2385, USA.
Daniel P
DP
Cerkoney
Candy
C
Reid
Constance M
CM
Doty
Ashley
A
Gramajo
Tyler D
TD
Campbell
Manuel A
MA
Morales
Kaveh
K
Delfanazari
Manabu
M
Tsujimoto
Takanari
T
Kashiwagi
Takashi
T
Yamamoto
Chiharu
C
Watanabe
Hidetoshi
H
Minami
Kazuo
K
Kadowaki
Richard A
RA
Klemm