Study, Modeling and Design of Semiconductor Photonic Crystal Based Devices

This thesis is focused on the study of nonlinear e�ects in semiconductor materials. The aim is the design of e�cient optical devices able to supply ultra-fast high-performances all-optical signal processing. The goal is pur- sued by implementing di�erent tools, either theoretical models as well as numerical methods. The main achievement is the design of new topologies for photonic crystal based devices that implement various optical functional- ities such as optical conversion and switching. This work has provided some con�gurations for the manufacturing of a new generation of optical devices.