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Response analysis of free-membrane transition-edge detectors with thin substrates

Kokabi, A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1088/1742-6596/153/1/012017
  3. Publisher: 2009
  4. Abstract:
  5. In this work, we have investigated and presented the bolometric response of freestanding membrane type of superconductive transition-edge detectors at micro-scale and submicron-scale substrate thicknesses. The technique applied here is based on the finite-size scaling method which is now extensively used for the calculation of thermal parameters of materials at low dimensions when the significance of surface energy contribution is not negligible compared to that of the total bulk energy. This method is used to evaluate the variation of specific heat per unit volume and heat conductivity and hence its effect on the total heat capacitance and conductance of the substrate versus its thickness. By using the thermal parameters obtained from the applied method we calculated the IR response in these types of the devices. This response when inspected at low thicknesses of substrates showed anomalistic behavior with respect to previous response analyses. Discussed in this paper, we also obtained the optimized substrate thickness for maximum responsivity of the device. The obtained results are compared to previous response calculations and experimental measurements. © 2009 IOP Publishing Ltd
  6. Keywords:
  8. Source: Journal of Physics: Conference Series ; Volume 153 , 2009 ; 17426588 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/1742-6596/153/1/012017