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Updated: May 17, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Spatial heterodyne interferometry with polarization gratings
Michael W Kudenov1, Matthew N Miskiewicz, Michael J Escuti
1Department of Electrical & Computer Engineering, North Carolina State University, Raleigh, North Carolina 27606, USA. mike.kudenov@ncsu.edu
Abstract:
The implementation of a polarization-based spatial heterodyne interferometer (SHI) is described. While a conventional SHI uses a Michelson interferometer and diffraction gratings, our SHI exploits mechanically robust Wollaston prisms and polarization gratings. A theoretical model for the polarization SHI is provided and validated with data from our proof of concept experiments. This device is expected to provide a compact monolithic sensor for subangstrom resolution spectroscopy in remote sensing, biomedical imaging, and machine vision applications.
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