Influence of the local heating position on the terahertz emission power from high-Tc superconducting Bi2Sr2CaCu2O8+δ mesas | Zendy

Chiho Watanabe | Zendy; Hidetoshi Minami | Zendy; Takeo Kitamura | Zendy; K. Asanuma | Zendy; K. Nakade | Zendy; T. Yasui | Zendy; Y. Saiwai | Zendy; Yuki Shibano | Zendy; Takashi Yamamoto | Zendy; Takanari Kashiwagi | Zendy; Richard A. Klemm | Zendy; Kazuo Kadowaki | Zendy

Open Access

Influence of the local heating position on the terahertz emission power from high-Tc superconducting Bi2Sr2CaCu2O8+δ mesas

Author(s) -

Chiho Watanabe,

Hidetoshi Minami,

Takeo Kitamura,

K. Asanuma,

K. Nakade,

T. Yasui,

Y. Saiwai,

Yuki Shibano,

Takashi Yamamoto,

Takanari Kashiwagi,

Richard A. Klemm,

Kazuo Kadowaki

Publication year - 2015

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4906768

Subject(s) - terahertz radiation , hot spot (computer programming) , materials science , superconductivity , laser , optoelectronics , radiation , high temperature superconductivity , optics , condensed matter physics , physics , computer science , operating system

Simultaneous measurements of spectroscopic terahertz emissions from and SiC photoluminescent local temperature T(r) distributions of high transition temperature Tc superconducting Bi2Sr2CaCu2O8+ δ rectangular mesa devices were made. A local region with T(r) > Tc known as a hot spot can emerge with current bias changes. When the hot spot position was moved to a mesa end by locally heating the mesa surface with a laser beam, the intensity of the emission increased, but no changes to its frequency or line width were observed. These results suggest that higher power radiation is attainable by adjusting the hot spot position

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