1 June 2008 Simultaneous phase-shifting ellipsometry based on grating beamsplitter
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Optical Engineering, 47(6), 063602 (2008). doi:10.1117/1.2948360
Abstract
Simultaneous phase-shifting ellipsometry based on a grating beamsplitter is presented. In the corresponding setup, an orthogonal grating and analyzer array are used. The latter is composed of four separate analyzers arranged in a 2×2 grid, the polarization axes of which are set to 0, 45, 90, and 135 deg. A mask allows only four diffracted beams of the fist order, having the same optical intensities, to pass. Each beam is incident on one of the analyzers of the array. The intensities of the four beams are simultaneously detected by a quadrant detector. The ellipsometric parameters are obtained using the four intensity signals. The feasibility of simultaneous phase shifting ellipsometry is thus demonstrated.
Kun Yang, Aijun Zeng, Xiangzhao Wang, Feng Tang, Hua Wang, "Simultaneous phase-shifting ellipsometry based on grating beamsplitter," Optical Engineering 47(6), 063602 (1 June 2008). http://dx.doi.org/10.1117/1.2948360
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KEYWORDS
Ellipsometry

Phase shifts

Beam splitters

Polarizers

Refractive index

Sensors

Error analysis

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