Autocalibrating Stokes polarimeter for materials characterization.
The design and construction of an ellipsometer based on a fixed-wavelength rotating-retarder Stokes polarimeter is described. Details are provided for an automated calibration scheme that provides two advantages for its operation. The first allows the phase of the lock-in amplifiers to be set based on the raw data, without a known calibration sample. The second illustrates that the relative amplitude of the acquired signals may also be calibrated in a similar manner. As an illustration, the refractive index and thickness of a glass cover slide are determined over a range of incident angles.
School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada.
Masaya
M
Shinki
Mario T
MT
Ivanov
Joshua S
JS
Post
Svein
S
Vagle
Jay T
JT
Cullen
Dennis K
DK
Hore