Conveners
(DCMMP) W3-3 Light and Matter | Lumière et matière (DPMCM)
- Saurabh Maiti (Concordia University)
Inelastic light scattering allows one to transfer energy from light to a system. Tracking the absorption provides clues about the allowed energy states in the system. The strongest signatures in such a spectrum usually come from the collective modes excited in the system. In this talk I will present new collective modes in spin-orbit coupled (SOC) systems, called the chiral-spin waves, and how...
An exact analytical expression for the probability of photon reabsorption and recycling in an idealized solar cell with Lambertian surfaces is derived. The existing approximations are found to agree with the exact formula to within a few per cent. The most accurate approximation turned out to be the simplest one that sets the reabsorption probability to the weak-absorption limit of the cell...
In this project, we explored the fabrication of SiGe quantum dots (QDs) in a silica matrix by ion implantation. Ion implantation is an important fabrication tool in the semiconductor industry, and can be used to make compounds beyond the chemical solubility limit and allows the study of a range of concentrations of Si and Ge. The relative concentration of Ge in SiGe alloys has a direct...
The long-term objective of this project is to develop cost-effective, versatile, and scalable, short-wave infrared detectors directly integrated into silicon. Unlike the direct bandgaps materials such as Si, Si1-xGex, and Si1-x-yGexSny provide a promising path toward Si-compatible devices for SWIR detection. In this project, Si (001) samples were implanted at room temperature with a tilt of 7...
