Terahertz wave emission from intrinsic Josephson junctions in high-T{sub c} superconductors.

Journal Article · Tue Oct 20 04:00:00 EDT 2009 · Supercond. Sci. Technol.

DOI:https://doi.org/10.1088/0953-2048/22/11/114009· OSTI ID:993705

Ozyuzer, L; Simsek, Y; Koseoglu, H; Turkoglu, F; Kurter, C; Welp, U; Koshelev, A E; Gray, K E; Kwok, W K; Yamamoto, T; Kadowaki, K; Koval, Y; Wang, H B; Muller, P

Recently, we experimentally demonstrated that rectangular mesa structures of intrinsic Josephson junctions (IJJ) in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+d} (Bi2212) can be used as a compact solid-state generator of continuous, coherent and polarized terahertz (THz) radiation. In the present work, we will exhibit tall mesas (over 600 junctions) which were fabricated using UV lithography, e-beam lithography with photoresist and e-beam lithography with a Ti selective etching technique. We will present measurements of the c-axis resistance as a function of temperature and of current-voltage characteristics of THz emitting mesas with lateral sizes ranging from 30 x 300 to 100 x 300 {micro}m{sup 2}. Furthermore, we will discuss the dependence of the characteristics of the mesa structures on the oxygen doping level of the Bi2212 crystals. We will also experimentally show that the voltage-frequency relation of the ac Josephson effect has to match the cavity resonance for successful emission.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 993705
• Report Number(s): ANL/MSD/JA-68517
• Journal Information: Supercond. Sci. Technol., Journal Name: Supercond. Sci. Technol. Journal Issue: Oct. 20, 2009 Vol. 22; ISSN 0953-2048
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ETCHING
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
OXYGEN
RESONANCE
SUPERCONDUCTORS