Vilson Rosa De Almeida

Title: The Innovative Contributions of Vilson Rosa De Almeida

Introduction

Vilson Rosa De Almeida is a prominent inventor based in Ithaca, NY (US). He has made significant contributions to the field of electro-optics, holding a total of 6 patents. His work focuses on advancing technologies that enhance optical communication and display systems.

Latest Patents

One of his latest patents is an electro-optic modulator on a rib waveguide. This modulator is formed on a silicon-on-insulator (SOI) rib waveguide, where an optical field is confined using an electrically modulated microcavity. The microcavity features reflectors on each side, and in one embodiment, a planar Fabry-Perot microcavity is utilized with deep Si/SiOBragg reflectors. Additionally, carriers can be laterally confined in the microcavity region by employing deep etched lateral trenches. The refractive index of the microcavity is varied through the free-carrier dispersion effect produced by a p-i-n diode formed around the microcavity. This modulator effectively confines both the optical field and charge carriers in a micron-sized region.

Another notable patent involves a light scattering optical resonator. These ring or disc optical resonators are designed with random or coherent corrugation on a top surface, enabling optical power to be radiated in a desired direction through light scattering. The resonators can be positioned near a waveguide, either in-plane or inter-plane, and are utilized in a polymeric photonic display. Light at each fundamental color is generated by light-emitting diodes, such as organic light-emitting diodes (OLEDs). The light is coupled into waveguides that cross an array of diffractive elements, including the resonators, each combined with an optical modulator, such as a polymer electro-optic (EO) modulator. This setup allows light from the waveguides to reach the diffractive elements, with control lines providing signals to the modulators for synchronized operation.

Career Highlights

Vilson Rosa De Almeida is associated with the Cornell Research Foundation Inc., where he continues to innovate and develop cutting-edge technologies. His work has significantly impacted the field of optical engineering and communication.

Collaborations

He has collaborated with notable colleagues, including Michal Lipson and Carlos Angulo Barrios, contributing to various research