Polarimetric interferometer for nanoscale positioning applications.
We propose and demonstrate a displacement control method at the subnanometric scale based on a Michelson interferometer combined with a polarimeter and a phase-locked loop electronic board. Step by step displacements with a step value of 5 nm are presented. A repeatability of 0.47 nm is obtained from back and forth displacements over 1 mum range. We show that a residual ellipticity of less than 10 degrees on the polarization state leads to a positioning error of less than 1 nm. Such system could be used over millimeter range displacements in a controlled surrounding environment leading to numerous applications in nanometrology.
Xu
S
S
LISV, University of Versailles Saint-Quentin, PRES UniverSud, Versailles, France.
Ouedraogo
K
K
Chassagne
L
L
Topçu
S
S
Juncar
P
P
Alayli
Y
Y