Calculation of thermal parameters of SiGe microbolometers
  The thermal parameters of a SiGe microbolometer were calculated using numerical modeling. The calculated thermal conduction and thermal response time are in good agreement with the values found experimentally and range between 2x10$^-7$ and 7x10$^-8$ W/K and 1.5 and 4.5 ms, respectively. High sensitivity of microbolometer is achieved due to optimization of the thermal response time and thermal conduction by fitting the geometry of supporting heat-removing legs or by selection of a suitable material providing boundary thermal resistance higher than 8x10$^-3$ cm$^2$K/W at the SiGe interface. 
A. V. Voitsekhovskii, D. V. Grigoryev, V. A. Yuryev, and S. N.   Nesmelov
cond-mat.mtrl-sci physics.optics