Non-Local Wavefront Shaping Using Entangled Photons

Wavefront shaping is a crucial technique in optics, traditionally used to correct aberrations and scattering that an optical beam may encounter along its propagation path [1], [2]. In a conventional wavefront shaping architecture, the optical signal passes through the complex medium, and an aberration correction device - typically a spatial light modulator (SLM) - is positioned along the same optical path (Figure 1a). One challenge of this approach is to properly integrate the SLM into the optical system to efficiently correct aberrations by developing suitable algorithms. To overcome this challenge, and also explore a new avenue in optical wavefront control, we developed a non-local wavefront shaping approach using entangled photons (Figure 1b). This approach decouples the wavefront shaping from the system containing the aberrations, enabling the development of new correction algorithms that may surpass existing methods and opening up new possibilities for applications in communication and imaging.