Modeling the electromagnetic cavity mode contributions to the THz emission from triangular Bi2Sr2CaCu2O8+δ mesas

• Published in: Physica. C, Superconductivity Superconductivity, 2013-08, Vol.491, p.30-34
• Main Authors: Klemm, Richard A., Delfanazari, Kaveh, Tsujimoto, Manabu, Kashiwagi, Takanari, Kitamura, Takeo, Yamamoto, Takashi, Sawamura, Masashi, Ishida, Kazuya, Hattori, Toshiaki, Kadowaki, Kazuo
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Inhomogeneous superconductors and superconducting systems; intrinsic Josephson junctions; Josephson junctions arrays and wire networks; Physics; Superconductivity; THz radiation; triangular electromagnetic cavities
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2012.11.006

► New wave functions for the equilateral triangular patch antenna found. ► Most general wave functions for the equilateral patch antenna found. ► Accurate eigenvalues and wave functions for highly acute isosceles triangular patch antennas found. In order to understand the radiation observed from the intrinsic Josephson junctions in triangular Bi2Sr2CaCu2O8+δ mesas, we calculate the transverse magnetic (TM) electromagnetic modes for thin equilateral cavities. A new set of distinct but degenerate TM modes coexists with the known modes of Helszajn and James, but are expected to lead to distinct radiation angular distribution patterns. Although we have been unable to solve for the exact TM modes of a thin cavity of general acute isosceles triangular shape, we solved exactly the closely related problems of the TM cavity modes of two thin circumscribing “pie-shaped” wedges, which provide highly accurate approximations to very acute isosceles triangular cavities.