Cavity Mode Enhancement Of Terahertz Emission From Equilateral Triangular Microstrip Antennas Of The High-T C Superconductor Bi2Sr2Cacu2O8 + Δ

Keywords

equilateral triangular wave functions; high temperature superconductor; intrinsic Josephson junctions; microstrip antennas; terahertz radiation

Abstract

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 ∝√m2+nm+n2 are much less dense than commonly thought. The R3 operations restrict the integral n and m to satisfy |m-n|=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+δ, and fit the emissions data from an earlier sample for which the C 3v symmetry was apparently broken.

Publication Date

11-1-2017

Publication Title

Journal of Physics Condensed Matter

Volume

29

Issue

1

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0953-8984/29/1/015601

Socpus ID

85000843924 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85000843924

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