Nanowerk April 25, 2024
Recent advancements have witnessed a significant shift toward the utilization of “flat” optics with thickness at subwavelength scales for the development of quantum light sources. This approach offers notable advantages over conventional bulky counterparts, including compactness, scalability, and improved efficiency, along with added functionalities. In this review researchers in Australia focused on the recent advances in leveraging flat optics to generate quantum light sources. Specifically, the generation of entangled photon pairs through spontaneous parametric down-conversion in nonlinear metasurfaces, and single photon emission from quantum emitters including quantum dots and color centers in 3D and 2D materials were explored. The review covered theoretical principles, fabrication techniques, and properties of these sources, with particular emphasis on the enhanced generation and engineering of quantum light sources using optical resonances supported by nanostructures. They discussed the diverse application range of these sources and the current challenges and perspectives in the field… read more. Open Access TECHNICAL ARTICLE
Sketch of the review. We review two types of flat-optics quantum light sources… Credit: Advanced Materials, 13 March 2024