The opposite transverse shifts for the right and left circular polarization components of a 100 fs 820 nm linearly polarized pulse focused onto GaAs are observed in situ via absorption. A time-delayed normally incident probe pulse scanned across the excitation spot detects the differential circular dichroism associated with the pump-induced transfer of spin angular momentum from light to electrons. More generally, we show that for a nonnormally incident probe, one can observe the spin Hall effect for probe light through a variety of pump-induced changes to a material’s optical properties.
© 2009 Optical Society of America
Original Manuscript: May 13, 2009
Manuscript Accepted: June 12, 2009
Published: July 23, 2009
Jean-Michel Ménard, Adam E. Mattacchione, Markus Betz, and Henry M. van Driel, "Imaging the spin Hall effect of light inside semiconductors via absorption," Opt. Lett. 34, 2312-2314 (2009)