Mohammad Hamdipour
http://www.sciencedirect.com/science/article/pii/S0921453417304136
By applying a voltage to a Josephson junction, the charge in superconducting layers (S-layers) will oscillate. Wavelength of the charge oscillations in S-layers is related to external current in junction, by increasing the external current, the wavelength will decrease which cause in some currents the wavelength be incommensurate with width of junction, so the CVC shows Fiske like steps. External current throwing along junction has some components, resistive, capacitive and superconducting current, beside these currents there is a current in lateral direction of junction, (x direction). On the other hand, the emitted electromagnetic wave power in THz region is related to AC component of electric field in junction, which itself is related to charge density in S-layers, which is related to currents in the system. So we expect that features of variation of current components reflect the features of emitted THz power form junction. Here we study in detail the superconductive current in a long Josephson junction (JJ) , the current voltage characteristics (CVC) of junction and emitted THz power from the system. Then we compare the results.
Comparing the results we see that there is a good qualitative coincidence in features of emitted THz power and supercurrent in junction.
No comments:
Post a Comment