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Published April 9, 2007 | Published
Journal Article Open

Full field phase imaging using a harmonically matched diffraction grating pair based homodyne quadrature interferometer


In this letter, the authors present a novel quadrature interferometry method based on the use of a harmonically matched shallow grating pair. Unlike a simple beam splitter or single shallow grating, the grating pair can confer a nontrivial interference phase shift (other than 0° or 180°) between the output ports of the interferometer. Using the grating pair as the beam splitter/combiner, the authors implement a homodyne quadrature full field phase interferometer and demonstrate the system's capability to acquire phase and amplitude images.

Additional Information

© 2007 American Institute of Physics (Received 31 January 2007; accepted 14 March 2007; published online 13 April 2007) The authors would like to acknowledge Emily McDowell for helpful discussion and Liang Feng from UC San Diego for help in fabrication. This project is supported by NSF BES-0547657.

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Published - WUJapl07a.pdf


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