Programme for Research-Development-Innovation on Space Technology and Advanced Research – STAR
(Romanian Space Agency)

Project description

Short description of the project

  • This project aims the research on high sensitivity Transition Edge Sensor (TES) bolometers based on thin layers of Yttrium-Barium-Copper-Oxide YBCO operating around transition temperature when the material leaves its superconducting state to normal state. In this region the resistance variation with temperature is very steep so that one can expect to obtain high detector responsivity. The main purpose of the bolometer proposed here is the atmosphere monitoring for the pollutants species as CO,CO2,SO2,CH4,NH3, etc by recording the absorption spectrum in the wavelength range 3-15 microns since it is well known that many of these species have a strong absorption in this spectral region. National Institute for Research and Development in Microtechnologies – IMT (the Coordinator)  will fabricate the bolometer since its  staff has a rich experience in the domain of Microtechnology and a multitude of facilities and equipments needed for fabrication microsystems devices. National Institute for Laser, Plasma and Radiation Physics INFLPR  has the task of YBCO thin layer deposition with the Pulsed Laser Deposition PLD equipment and the expertise of thin layer deposition with this equipment. SC Optoelectronica 2001 SA has the mission to design and fabricate the read-out electronic circuits and finally to characterize the functional model of bolometer. 
  • Project goal - This project aims to investigate, optimize and practically realize a high sensitivity Transition Edge Sensor (TES) bolometers based on thin layers of the high temperature superconductor Yttrium-Barium-Copper-Oxide YBCO, which operates in the middle and long infrared.

  • Objectives - For successfully accomplishing this objective, we have delineated the following specific objectives:

    - Obtaining the high quality films of high temperature superconductors with various dopings and implicitly various critical temperatures above liquid nitrogen presenting good electrical properties and sharp transition from the superconducting to normal state.
    - Optimization of the YBCO TES bolometer in terms of geometrical parameters, thermal insulation of the sensitive layer, and mechanical properties.
    - Identifying the materials which can act as absorption layers deposited on the top of the YBCO sensitive layer which in the same time do not affect the superconducting properties.
    - Realization of the bolometer structures using micro and nano fabrication techniques.

  • Estimated results - Functional model of bolometer –sensor integrated with the read-out circuits. Filing one ore more patents. Public dissemination of non patentable results in ISI ranked journals and scientific conferences