CUED Publications database

Characterization of cavity mode and radiation pattern in superconducting coherent terahertz emitters

Delfanazari, K and Klemm, R and Tsujimoto, M and Cerkoney, D and Yamamoto, T and Kashiwagi, T and Kadowaki, K (2019) Characterization of cavity mode and radiation pattern in superconducting coherent terahertz emitters. In: American Physical Society March Meeting 2019, 2019-3-4 to 2019-3-8, Boston, Massachusetts, USA.

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Abstract

We discuss the broadly tunable terahertz (THz) radiation in solid state terahertz (THz) emitters based on high-temperature superconducting Bi2Sr2CaCu2O8+δ (Bi-2212). We experimentally measure the current-voltage characteristics (IVC) of mesas of different geometries, such as triangular-, pentagonal-, hexagonal-, and elliptical- cavities, and compare the IVC of the radiating and no-radiating cavities. The THz emission spectra in radiating THz cavities was measured using the Fourier transform infrared spectrometer in order to elucidate the radiation mechanism of the emitters. Moreover, we experimentally and theoretically study the angular dependence of the emission intensity obtained in mesas’ plane at various frequencies and detection angles, by rotating the sample holder relative to the detector, to identify the excited EM cavity modes within the cavities that participate in the emitter output power enhancement. Reference: [1] DP Cerkoney et al., J. Phys. Condens. Matter 29, 015601 (2016), [2] K. Delfanazari et al, J. Infrared Millim. Terahertz Waves 35, 131-146 (2014), [3] K. Delfanazari et al., IEEE Trans. Terahertz Sci. Technol. 5, 505-511 (2015), [4] K. Delfanazari et al., Opt. Express 21, 2171-2184 (2013),

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 13 Jan 2019 20:19
Last Modified: 18 Aug 2020 12:52
DOI: