Canada Excellence Research Chairs

Zenghu Chang

Canada Excellence Research Chair in Attosecond X-ray Photonics (2024 – 2031)

Attosecond X-ray pulses are the shortest bursts of light that scientists can create and control. To give you an idea of how short they are, one attosecond is equivalent to one quintillionth of a second, which is like comparing one second to the entire age of the universe (14 billion years). Attosecond X-ray photonics is a field that observes the movements of electrons inside atoms and molecules in real time, similar to capturing slow-motion footage of athletes performing on ice. Dr. Zenghu Chang is leading a program at the University of Ottawa to develop the world's first compact attosecond source that produces X-rays with a broad range of wavelengths, allowing scientists to study every element on the periodic table using attosecond X-ray spectroscopy in university laboratories. Such a breakthrough will enable researchers to explore and control incredibly fast processes involved in solar cells and quantum materials, advancing our understanding of physical chemistry at its core.