CUED Publications database

Cavity modes in broadly tunable superconducting coherent terahertz sources

Delfanazari, K and Klemm, RA and Tsujimoto, M and Cerkoney, DP and Yamamoto, T and Kashiwagi, T and Kadowaki, K (2019) Cavity modes in broadly tunable superconducting coherent terahertz sources. Journal of Physics: Conference Series, 1182. 012011-012011. ISSN 1742-6588

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Abstract

© 2019 Published under licence by IOP Publishing Ltd. We discuss the cavity modes and radiation pattern in solid state terahertz (THz) sources based on layered high-temperature superconducting Bi2Sr2CaCu2O8+δ (Bi-2212). We experimentally measure the emission spectra using the Fourier transform infrared spectrometer in order to elucidate the radiation mechanism of the mesa samples. Moreover, we experimentally study the angular dependence of the emission intensity obtained in one mesa's plane at the frequency f = 0.61 THz, at various detection angles θ by rotating the sample holder relative to the detector, to identify the excited EM cavity modes within the mesa that participate in the device output power enhancement. We modelled the mesa cavity and find a relatively good agreement between the experiment and theory. Our results show that compact, coherent and continuous-wave Bi-2212 THz devices are one of the most promising THz sources, capable of bridging the microwaves to photonics gap.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 21 Apr 2019 20:04
Last Modified: 19 Nov 2020 10:35
DOI: 10.1088/1742-6596/1182/1/012011