Germanium doping for improved silicon substrates and devices

Midinfrared Plasmon-Enhanced Spectroscopy with Germanium Antennas on Silicon Substrates.

Midinfrared plasmonic sensing allows the direct targeting of unique vibrational fingerprints of molecules. While gold has been used almost exclusively so far, recent research has focused on semiconductors with the potential to revolutionize plasmonic devices. We fabricate antennas out of heavily doped Ge films epitaxially grown on Si wafers and demonstrate up to 2 orders of magnitude signal enh...

Germanium-on-Silicon for Integrated Silicon Photonics

To meet the unprecedented demands for data transmission speed and bandwidth silicon integrated photonics that can generate, modulate, process and detect light signals is being developed. Integrated silicon photonics that can be built using existing CMOS fabrication facilities offers the tantalizing prospect of a scalable and cost-efficient solution to replace electrical interconnects. Silicon, ...

Spin-on doping of germanium-on-insulator wafers for monolithic light sources on silicon

Temperature control of silicon-germanium alloy epitaxial growth on silicon substrates by infrared transmission

We report the application of the technique of infrared transmission to measure the temperature of silicon wafers during the growth of silicon-germanium alloy heteroepitaxial layers in a rapid thermal processing system. The silicon-germanium alloy layers have negligible absorption at 1.3 and 1.55 pm over wide ranges of thickness, composition, and strain condition. The substantial improvement of ...

Gettered GaP Substrates for Improved Multijunction Solar Cell Devices

We report on the characterization of gettered p-type GaP substrates for application in high-efficiency multijunction solar cells. A commercial zinc-doped GaP substrate was divided, with one piece soaked in a phosphorussaturated gallium-aluminum melt at 975 C. Low-temperature continuouswave photoluminescence indicated a significant decrease in deep-level impurity peaks due to oxygen and zinc-oxy...