PHOTORESPONSE OF RESISTIVE AND KINETIC INDUCTIVE YBA2CU3OX BOLOMETER

We have studied both resistive bolometric and kinetic inductive bolome tric effects using the same meander line made of YBa2Cu3Ox thin film a s a sensing element near the superconducting transition as a function of temperature and irradiation intensity. It was found that the kineti c inductive bolometer. shows higher response with respect to the therm al irradiation than the resistive bolometer under the same thermal sur roundings. This performance seems to arise mainly from the reduction o f 1/f and Johnson noise since the operating temperature range of the k inetic inductive bolometer is below the onset temperature of dissipati on. The temperature increase Delta T of the sensing element of kinetic inductive bolometer due to the absorption of the incident radiation w as obtained from the scaling of the inductive response. A response was found to be proportional to Delta T implying that the main photorespo nse mechanism is mostly bolometric. (C) 1998 Published by Elsevier Sci ence Ltd. All rights reserved.