Pyramid optical networks for unidirectional image magnification and demagnification

https://phys.org/news/2024-08-pyramid-optical-networks-unidirectional-image.html

"Pyramid-D2NN: pyramid-structured diffractive all-optical transmissive layers optimized through deep learning performing computational tasks... scales layers pyramidally aligning with image magnification or demagnification direction... high-fidelity image formation in 1 direction/ inhibiting it in other, achieving unidirectional imaging with fewer diffractive degrees of freedom... optically isolated photonics, decoupling transmitters/ receivers in telecommunications, privacy-protected optical communications, surveillance"