Before revision: Reflectance difference spectroscopy is a spectroscopic technique which measures the difference in reflectance of two beams of light that are shone in normal incident on a surface with different linear polarizations.Peter Y. Yu, Manuel Cardona ,"Fundamentals of Semiconductors" It is also known as Reflectance Anisotropy Spectroscopy (RAS).
After revision: Reflectance difference spectroscopy is a spectroscopic technique which measures the difference in reflectance of two beams of light that are shone in normal incident on a surface with different linear polarizations.Peter Y. Yu, Manuel Cardona ,"Fundamentals of Semiconductors" It is also known as reflectance anisotropy spectroscopy (RAS).