Huggard, P. G. and Zeuner, S. and Goller, K. and Lengfellner, Hans and Prettl, Wilhelm
Normal state YBa2Cu3Ox films: A new fast thermal detector for far infrared laser radiation with a uniform wavelength response.
Journal of Applied Physics 75 (1), pp. 616-618.
Room temperature YBa2Cu3Ox films, epitaxially grown on oriented substrates, are shown to be effective detectors of far infrared laser pulses. The photovoltage arises due to an anisotropic material thermopower subject to the thermal gradient arising from the radiation heating. For a 40 nm thick film we have measured a responsivity of (5±2)×10−7 V/W, independent of frequency in the range from 20 to 110 cm−1. The response time is limited by thermal diffusion, giving a 200 MHz detector bandwidth and a noise equivalent power of 3.6×10−3 W(Hz)−1/2 for this film thickness. Due to their large area (1 cm2) and uniform spectral response, such films may be useful replacements for pyroelectric power/energy meters.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Hans Lengfellner|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Wilhelm Prettl
|07.57.Kp; 42.79.Pw; 74.78.-w||PACS|
|Keywords:||RADIATION DETECTION, INFRARED RADIATION, YTTRIUM OXIDES, BARIUM OXIDES, COPPER OXIDES, QUATERNARY COMPOUNDS, THIN FILMS, SPECTRAL RESPONSE, PHOTOVOLTAIC EFFECT, THERMOELECTRIC PROPERTIES, MHZ RANGE 100−1000, LASER RADIATION|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||04 Oct 2010 12:31|
|Last Modified:||23 Nov 2012 06:59|