Tunable terahertz emission from Bi{<_2}Sr{<_2}CaCu{<_2}O{<_8+delta} mesa devices.

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Phys. Rev. B

DOI:https://doi.org/10.1103/PhysRevB.84.064523· OSTI ID:1025718

Benseman, T M; Koshelev, A E; Gray, K E; Kwok, W -K; Welp, U; Kadowaki, K; Tachiki, M; Yamamoto, T ^[1]

---

1. Materials Science Division

We have measured coherent terahertz emission spectra from Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} mesa devices as a function of temperature and mesa bias voltage. The emission frequency is found to be tunable by up to 12% by varying the temperature and bias voltage. We attribute the appearance of tunability to asymmetric boundaries at the top and bottom and the nonrectangular cross section of the mesas. This interpretation is consistent with numerical simulations of the dynamics of intrinsic Josephson junctions in the mesa. Easily tunable emission frequency may have important implications for the design of terahertz devices based on stacked intrinsic Josephson junctions.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1025718
• Report Number(s): ANL/MSD/JA-70978; TRN: US1104969
• Journal Information: Phys. Rev. B, Vol. 84, Issue 2011; ISSN 1098--0121
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CROSS SECTIONS
DESIGN
EMISSION SPECTRA
JOSEPHSON JUNCTIONS