Open Access. Powered by Scholars. Published by Universities.®
Nanoscience and Nanotechnology Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Nanoscience and Nanotechnology
Ion Beam Modification Of Single Crystal Sapphire For High Temperature Optical Waveguiding, William Spratt
Ion Beam Modification Of Single Crystal Sapphire For High Temperature Optical Waveguiding, William Spratt
Legacy Theses & Dissertations (2009 - 2024)
High temperature environments (>1000°C) provide a significant challenge for fiber optic based sensing due to the poor physical properties of silica fiber at elevated temperature. Not only does silica soften above 1000°C, but the dopants that are responsible for the refractive index change between the core and cladding diffuse, reducing the fibers effectiveness as a waveguide. Single-crystal sapphire fiber has the potential to supplement fiber sensing at high temperature however sapphire fiber is unclad and no cladding methods exist that withstand high temperatures. In addition to higher losses the lack of a cladding also leads to decreased sensitivity due …
Ion Beam Nano-Engineering Of Erbium Doped Silicon For Enhanced Light Emission At 1.54 Microns, Sebastian Naczas
Ion Beam Nano-Engineering Of Erbium Doped Silicon For Enhanced Light Emission At 1.54 Microns, Sebastian Naczas
Legacy Theses & Dissertations (2009 - 2024)
Erbium doped silicon is of great interest as a potential light source in Silicon Photonics research due to its light emission at 1.54 μm, which corresponds to the minimal loss of optical transmission in silica fibers for telecommunications. In this thesis a basic mechanism for excitation and de-excitation of Er in Si is reviewed. Based on such fundamental understanding, an innovative approach is proposed and implemented to improve Er luminescence properties through the formation of metal nanoparticles via impurity gettering in Si nanocavities.