Fall 2016

Ultrafast Optical Measurements of Spin Polarization in Semiconductors

Vanessa Sih
Monday, September 12, 2016 - 4:30pm

While both spin dynamics and electron orbital motion have been separately studied for many decades, we are just beginning to probe and understand the intricate phenomena that may be expected in the presence of spin-momentum coupling.  For example, it is still a mystery what the microscopic mechanism is that produces a bulk electron spin polarization in semiconductors in response to an applied accelerating electric field and how the electrical spin generation rate depends on material parameters.  Existing theories predict that the magnitude of this electrically-...