Abstract-Terahertz emission from the intrinsic Josephson junctions of high-symmetry thermally-managed Bi2Sr2CaCu2O8+δ microstrip antennas

Klemm, R and Davis, A and Wang, Q and Yamamoto, T and Cerkoney, D and Reid, C and Koopman, M and Minami, H and Kashiwagi, T and Rain, J and Doty, C and Sedlack, M and Morales, M and Watanabe, C and Tsujimoto, M and Delfanazari, Kand Kadowaki, K

http://publications.eng.cam.ac.uk/959268/

We show for high-symmetry disk, square, or equilateral triangular thin microstrip antennas of any composition respectively obeying C∞v, C4v, and C3v point group symmetries, that the transverse magnetic electromagnetic cavity mode wave functions are restricted in form to those that are one-dimensional representations of those point groups. Plots of the common nodal points of the ten lowest-energy non-radiating two-dimensional representations of each of these three symmetries are presented. For comparison with symmetry-broken disk intrinsic Josephson junction microstrip antennas constructed from the highly anisotropic layered superconductor Bi2 Sr2 CaCu2 O8+δ (BSCCO), we present plots of the ten lowest frequency orthonormal wave functions and of their emission power angular distributions. These results are compared with previous results for square and equilateral triangular thin microstrip antennas.

Abstract-Terahertz emission from pie-shaped wedge microstrip antennas of the high-Tc superconductor Bi2Sr2CaCu2O8+δ

Wang, Q and Doty, C and Klemm, R and Delfanazari, K and Cerkoney, D and Yamamoto, T and Tsujimoto, M and Kadowaki, K and Watanabe, C and Minami, H and Kashiwagi, T and Morales, M

http://publications.eng.cam.ac.uk/880368/

We calculate the standing wave functions for pie-shaped wedge microstrip antennas of various wedge angles ϕ0. We then calculate the emission distributions from the uniform Josephson current and from the excitation of a cavity mode generated from the stand wave functions. For a narrow dieter's pie slice, quantitative fits to the experimental data on a Bi2Sr2CaCu2O8+δ narrow isosceles triangular mesa are shown.