Comparison of uniaxial and polyaxial suspended germanium bridges in terms of mechanical stress and thermal management towards a CMOS compatible light source.Germanium (Ge) is a promising candidate for a CMOS compatible laser diode.  There have been two recent demonstrations of low-temperature optically-pumped lasing in these bridges but no room temperature operation accredit to insufficient strain and poor thermal management.  In this paper we compare uniaxial bridges with polyaxial bridges in terms of mechanical stress and thermal management using finite element modelling (FEM).  Thermal simulations however reveal that they are much less thermally sensitive than uniaxial bridges which may indicate lower optical losses. 
THERM