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THz wave radiation from triangular mesas in layered high-Tc superconductor Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions

Delfanazari, K and Tsujimoto, M and Kashiwagi, T and Asai, H and Yamamoto, T and Sawamura, M and Kitamura, T and Nakayama, R and Ishida, K and Minami, H and Hattori, T and Kadowaki, K (2012) THz wave radiation from triangular mesas in layered high-Tc superconductor Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions. In: American Physical Society (APS) March Meeting, 2012-2-27 to 2012-3-2.

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Abstract

Recently, it has been reported that the mesa structures fabricated from single crystalline high-Tc superconductor Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions generate THz waves [1, 2]. However, most of the radiations in the previous studies were observed either below the critical current where the junctions switched to the resistive state or around the retrapping region. We present here three types of emission for isosceles triangular mesas in which THz waves were also additionally detected above the critical current where the external current is increasing in the resistive branch structures.Furthermore, intense, coherent, monochromatic, continuous and tunable THz waves were observed in various triangular mesas fabricated by the focus ion beam (FIB) technique [3]. Moreover, elucidating the oscillating modes inside the mesas by precisely studying the IV characteristics, FT-IR spectrum and angular dependence of the emission intensity will be discussed in detail at the meeting. [1] L. Ozyuzer et al. Science 318, 1291 (2007). [2] K. Kadowaki et al. Physica C 468 634 (2008). [3] K. Delfanazari et al. J. Phys. Conf. Ser. Accepted (2011).

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 25 Feb 2018 20:07
Last Modified: 18 Aug 2020 12:43
DOI: