Dark current densities Germania-tin alloy 1 Germania-tin on insulator 1 Germanium 1 Germanium tins 1 Germanium-tin alloys 1 Germaniums (Ge) 1 Metal semiconductor metal photodetector 1 Metals 1 Optical waveguides 1 Photodetectors 1 Photons 1 Plasma temperature 1 Responsivity 1 Silicon 1 Strain 1 Systematic study 1 Tin alloys 1 Waveguides 1 germanium-tin on insulator 1 metal-semiconductor-metal photodetector 1