CUED Publications database

Effect of magnetic field on the coherent THz emission from mesas of single crystal Bi2Sr2CaCu2O8+δ

Kitamura, T and Kashiwagi, T and Tsujimoto, M and Delfanazari, K and Nakayama, R and Sawamura, M and Yamamoto, T and Asai, H and Minami, H and Tachiki, M and Kadowaki, K (2012) Effect of magnetic field on the coherent THz emission from mesas of single crystal Bi2Sr2CaCu2O8+δ. In: American Physical Society March meeting, 2012-2-27 to 2012-3-2, Boston, USA..

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Coherent and continuous electromagnetic (EM) waves radiation phenomena with a mesa structure of Bi2Sr2CaCu2O8+δ single crystal have been investigated precisely in a magnetic field up to only 200 Oe where the emission intensity decreases sharply expectedly for the field H parallel to the c-axis. The emission could not be observed above 20 Oe for H//c-axis whereas it persisted up to 160 Oe for H// ab plane [1]. These results indicate that both pancake vortices as well as Josephson vortices suppress the THz emission very strongly. On the other hand, the Josephson plasma resonance phenomena have been observed in both H// ab and H//c even in very high fields (∼Tesla). The emission processes are considered to be the reverse processes of the absorption. It is interesting to pose a question what happens in high fields in the EM waves emission. We show interesting experimental results of THz emission in high magnetic fields including low field region and will argue the mechanism of emission in high magnetic fields. [1] K. Yamaki \textit{et al}., Physica C 470 (2010) S804-805.

Item Type: Conference or Workshop Item (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