Four-dimensional integrated photonic devices – New technique to introduce an extra ‘synthetic’ dimension to an array

The dream for integrated photonics is to develop on-chip optical components that could eventually replace electronic circuits by offering greater speed, energy efficiency, and potential for miniaturization. Inspired by this goal, many innovative photonics devices are currently being designed, e.g., arrays of micro-scale waveguides to control the propagation of photons on a silicon chip.1–4 Along with these advances, some surprising connections to other areas of physics, such as condensed matter and ultracold atomic gases, have also been discovered. This has ignited the hope that integrated photonics could be useful—not only for applications—but also to cast light on cutting-edge research topics in fundamental science. Continue reading “Four-dimensional integrated photonic devices – New technique to introduce an extra ‘synthetic’ dimension to an array”