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Silicon and germanium are transparent up to approximately 8 µm and 15 µm, respectively, thus offering a range of applications in biochemical and environmental sensing, medicine, astronomy and communications. In this paper we present our recent results on germanium and silicon modulators and detectors suitable for mid-infrared communications.
A review of passive and active photonic devices in three mid-IR silicon photonics material platforms suitable for communications and sensing, silicon on insulator (SOI), suspended silicon and germanium on silicon, is presented.
We report our advances in development of subwavelength engineered structures for integrated photonics. This unique technology allows synthesis of an effective photonic medium with an unprecedented control of material properties, constituting a powerful tool for a designer of photonic integrated circuits. By locally engineering the refractive index of silicon by forming a pattern of holes at the subwavelength...
All-optical modulation is demonstrated in low loss germanium-on-silicon waveguides at mid-infrared wavelengths. The results indicate the suitability of this platform for optical signal processing in this long wavelength regime.
Silicon and germanium are transparent up to approximately 8 μm and 15 μm, respectively, thus offering a range of applications in biochemical and environmental sensing, medicine, astronomy and communications [1]. Silicon-on-insulator (SOI), can be used only up to 4 μm due to the high absorption loss of silicon dioxide, and therefore alternative material platforms have to be utilized for longer wavelengths...
We report our advances in development of subwavelength engineered waveguide structures. This unique NRC patented technology [1,2] allows synthesis of a metamaterial with an unprecedented control of material properties, constituting a powerful tool for a designer of photonic integrated circuits. We have demonstrated a number of subwavelength engineered devices operating at telecom wavelengths [3–7],...
Germanium-on-silicon is a promising platform for planar photonics over the entire mid-infrared range. We report here grating coupled Ge-on-Si waveguides with record low losses of 0.6dB/cm, multimode interferometers and Mach-Zehnder interferometers.
Localized GOI wires have been grown using a LPE process resulting in single crystal layers up to 400 urn in length and 5 urn in width. We have reported on the design, fabrication and characterisation of a 4-channel AMMI structure integrated with germanium p-i-n photodetectors to form a silicon photonics receiver. Light detection at 50 Gb/s has been demonstrated with a low dark current of < 20 nA...
The amount of internet traffic increases year by year. The bandwidth demands of internet consumers is ever increasing, although the costs at which improved services are offered does not scale at the same rate. The power consumption of components in the internet network is alarming and is an issue that urgently needs addressing as the technology which serves the internet is developed. Network providers...
We discuss recent results in our work on Silicon Photonics. This includes both active and passive devices for a variety of applications. In particular we discuss work on wafer scale testing, modulators and drivers, device integration and mid-IR silicon photonics components. These devices are important both for established applications such as integrated transceivers for short reach interconnects,...
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