Possibility of fabricating an inductive high-speed detector for electromagnetic radiation using thin YBa2Cu3O7−δ films

It is shown that an inductive high-speed nonequilibrium detector for electromagnetic radiation can be fabricated using thin YBaCuO films. An electronic detection regime has been obtained for the first time using a low-temperature inductive YBaCuO detector in the measuring frequency band Δf=1–50 MHz and it has been shown that no bolometric detection regime exists at operating temperatures far below the superconducting transition. The time constant of the low-temperature inductive YBaCuO detector in the electronic regime is determined only by the electron-phonon interaction time in the nodal regions τ _e-ph ^d . The detector has the following limiting characteristics: when the operating temperature is reduced from 10 to 1K, the time constant τ _D varies between 10 and 100 ps and the sensitivity D* improves substantially from 10⁹ to 4×10¹² W⁻¹ cm Hz^1/2. Pis’ma Zh. Tekh. Fiz. 25, 14–19 (January 26, 1999)