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Dr. Daniel Espinosa

POSTDOCTORAL RESEARCHER

My interest in solid-state physics began in my teenage years, when I attended a technical course in electronics, which motivated me to pursue a physics degree. I completed my B. Sc. in Physics (2006), M. Sc. in Electrical Engineering (2011), and Ph.D. in Physics (2017), all at the University of Sao Paulo (USP), Brazil, where I acquired experience with the Z-Scan technique on magnetic nanoparticles colloidal suspensions and semiconductors thin-films. I worked as a laboratory specialist for the Complex Fluid Group at USP, under Prof. A. M. Figueiredo Neto's supervision, who was also my Ph. D. supervisor, and as an electrical engineering lecturer for the Anhembi Morumbi University (Sao Paulo, Brazil), before moving to uOttawa. I joined the Nonlinear Photonics Group as Postdoctoral Fellow in January of 2018, under Prof. Ksenia Dolgaleva's supervision. Since then, I have been researching the nonlinear optical properties of III-V semiconductors by characterizing the group's photonic devices while training students in the lab to perform the four-wave mixing and nonlinear transmission techniques. To give some examples of the research outcomes so far, we have demonstrated the influence of the geometry on the AlGaAs waveguides' four-wave mixing efficiency and nonlinear absorption spectrum.