Jan J. Dubowski

Canada Research Chair in Quantum Semiconductors

Tier 1 - 2003-10-01
Université de Sherbrooke
Natural Sciences and Engineering

819- 821-8000, ext./poste 2528

Research involves

Exploring innovative laser-based methods of quantum semiconductor materials fabrication and bandgap engineering for the purpose of developing a new generation of photonic devices for both information engineering and life sciences.

Research relevance

Manipulating the properties of quantum semiconductor materials will lead to the low-cost development of computer systems for data processing and transmission, and high-performance tools for biomolecular analysis.

Using Quantum Physics to Make Advances in Photonics

Biodiagnostics and telecommunications are two key sectors in society that have taken advantage of the photonics revolution-a revolution in the materials processing as well as is data processing, transmission and storage using photons. It is largely the result of the development of semiconductor quantum materials, which are made up of minute structures (e.g. quantum dots, nanowires, nanotubes, etc.) no bigger than a few nanometres (10-9 m), within which electrons undergo specific quantum effects.

However, the advancements in photonics have not yet been fully exploited: material-manufacturing technologies are far from being fully developed, and we still have insufficient knowledge of the properties of nanostructures. For example, we still cannot produce quantum dots of uniform size that would be adequately distributed on the surface.

Jan Dubowski is an expert in developing innovative methods based on the use of photons for the fabrication of semiconductor nanostructures. As chairholder, he plans to unveil a number of mysteries surrounding quantum dots, wells and wires. He will also endeavour to modify the properties of the above nanostructures at the atomic level with a view to enhancing performance and generating miniaturization of a variety of photonics devices. He will use a number of photon sources (lasers) for the study and high-precision manufacture of quantum semiconductor materials.

One of the most promising potential outcomes of Dubowski's work is the ability to use quantum dots in biodiagnostics and thereby obviate the need to apply today's fluorescent marking methods.