Fabrication of double mesa structures by E-beam lithography from high temperature superconducting Bi2Sr2CaCu2O8+δ (Bi2212) for powerful terahertz emission

Author

Demirhan, Y. ; Türkoglu, F. ; Köseoglu, H. ; Saglam, H. ; Minematsu, M. ; Araki, H. ; Miyakawa, N. ; Ozyuzer, L.

Author_Institution

Dept. of Phys., Izmir Inst. of Technol., Urla Izmir, Turkey

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

We work on a frequency tunable solid state device to meet the needs of continuous, coherent, powerful terahertz emission sources that fill practically important terahertz gap. High temperature superconducting (HTS) coherently oscillating Josephson junctions in Bi₂Sr₂CaCu₂O_8+δ (Bi2212) crystal make this approach very promising. Since doping dependence of Bi2212 is an important parameter, Bi2212 crystals are annealed in vacuum or purified argon gas flow at 425°C. For further processing we pattern both single and double rectangular mesa structures by using electron beam lithography on the cleaved surface of the crystal. Resistance-temperature (R-T), and current-voltage behavior (I-V) measurements achieved..

Keywords

argon; bismuth compounds; calcium compounds; copper compounds; crystals; electric current measurement; electron beam lithography; semiconductor doping; strontium compounds; superconducting junction devices; temperature measurement; voltage measurement; Bi2212 crystal; Bi₂Sr₂CaCu₂O_8+δ; current-voltage behavior measurement; doping dependence; double mesa structure fabrication; double rectangular mesa structures; e-beam lithography; electron beam lithography; frequency tunable solid state device; high temperature superconducting; oscillating Josephson junction; purified argon gas flow; resistance-temperature measurement; single rectangular mesa structures; terahertz emission; Crystals; Doping; High temperature superconductors; Josephson junctions; Lithography; Surface treatment; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6050679

Filename

6050679