CUED Publications database

(Invited) Terahertz emission from the intrinsic Josephson junctions of high-symmetry thermally-managed BSCCO 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, K and Kadowaki, K (2017) (Invited) Terahertz emission from the intrinsic Josephson junctions of high-symmetry thermally-managed BSCCO microstrip antennas. In: The 2017 Cryogenic Engineering Conference and International Cryogenic Materials Conference (CEC-ICMC), 2017-7-9 to 2017-7-13, Madison Wisconsin, USA..

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We study the coherent terahertz emission from the intrinsic Josephson junctions in thermally-managed, high-symmetry, thin microstrip antennas constructed from single crystals of the highly two-dimensional, layered high-temperature superconductor BSCCO. The thin antennas studied are disk [1,2], square [3], and equilateral triangular [4,5] in shape. Upon application of a dc voltage across the junctions, the primary radiation source is the uniform ac Josephson current, but when the appropriate point in the current-voltage characteristics is found, the excitation of an electromagnetic cavity mode can lead to a considerable enhancement of the output power. When properly thermally managed by covering the top and bottom of a thin BSCCO crystallite with Au and sandwiching that between sapphire plates[6], only the one-dimensional representation wave functions of the appropriate point groups are excited, and the world record 2.4 THz emission from a superconductor was recently observed [2] from such a device. The coherent emission is widely tunable and has a narrow linewidth. The angular distributions of the output power are calculated and compared with experiment. [1] M. Tsujimoto et al., Phys. Rev. Lett. 105, 037005 (2010). [2] T. Kashiwagi et al., Appl. Phys. Lett. 107, 082601 (2015). [3] R. A. Klemm et al., IEEE JSTQE (2017, in press). [4] D. P. Cerkoney et al., J. Phys.: Condens. Matter 29, 015601 (2017). [5] K. Delfanazari et al., Opt. Express 21, 2171 (2013). [6] T. Kashiwagi et al., Phys. Rev. Applied 4, 054018 (2015).

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Aug 2017 20:05
Last Modified: 10 Aug 2017 01:35