Speaker
Xiaoxiang Xi
(Brookhaven National Laboratory)
Description
X. Xi
X.-J. Wang
Y. Shen
J.B. Murphy
X. Yang
and G.L. Carr
Photon Sciences, Brookhaven National Laboratory
We have begun an experimental study of superconductivity breakdown behavior in a thin NbN film when exposed to a single, strong-field THz pulse. By limiting the THz spectral content to below-gap frequencies, the breakdown is assumed to take place when the induced current density exceeds the critical current density - but the details for this process are mostly unknown due to the onset of thermal effects in typical transport measurements. A finite-difference time-domain approach has been developed to model the process and compared with experimental results that show significant non-linear THz upconversion as breakdown occurs.
Primary author
Xiaoxiang Xi
(Brookhaven National Laboratory)
