RESPONSE OF SUPERCONDUCTOR IN THE NON-JOS EPHSON OSCILLATION MODE TO EXTERNAL ELECTROMAGNETIC-FIELD

Complex studies of the electromagnetic field influence in a wide range (sound - IR) of frequencies upon the non-Josephson oscillation (NJO) effect am reported. The changes in the effect parameters and simultane ously in the energy gap due to the external radiation power are examin ed. It is shown that with frequency changing from a value lower than 1 /tau(epsilon) to a value exceeding 1/tau(epsilon) the character of the influence produced by the external electromagnetic field intensity up on the order parameter changes too - from suppression to stimulation. This leads to an increase in the NJO frequency in the former caw or it s decrease in the latter case. At frequencies close to that of the NJO the sample behaves like a nonlinear parametric system. The results ob tained support the basic issues of the model proposed to explain the N JO effect.