NANOSCALE TOPOGRAPHY AND SPATIAL LIGHT MODULATOR CHARACTERIZATION USING WIDE-FIELD QUANTITATIVE PHASE IMAGING

Gannavarpu Rajshekhar,1 Basanta Bhaduri,1 Chris Edwards,2 Renjie Zhou,2 Lynford L. Goddard,2 and Gabriel Popescu1,
OPTICS EXPRESS 3432, Vol. 22, No. 3 2014

We demonstrate an optical technique for large field of view quantitative phase imaging of reflective samples. It relies on a common-path interferometric design, which ensures high stability without the need for active stabilization. The technique provides single-shot, full-field and robust measurement of nanoscale topography of large samples. Further, the inherent stability allows reliable measurement of the temporally varying phase retardation of the liquid crystal cells, and thus enables real-time characterization of spatial light modulators. The technique’s application potential is validated through experimental results.