From high-speed communication to quantum computing and sensing, the detection, transmission, and manipulation of light (photons) have transformed modern electronics. Central to these systems are photon detectors, which detect and measure photons.

One notable type is the superconducting nanowire single-photon detector (SNSPD). SNSPDs utilize ultra-thin superconducting wires that quickly transition from a superconducting state to a resistive state when a photon strikes, allowing for ultra-fast detection.

The wires in these detectors are arranged in a Peano arced-fractal pattern, which remains consistent across various scales. This unique design enables the detector to detect photons regardless of their direction or polarization (the orientation of the photon’s electric field). Due to these advantages, arced-fractal SNSPDs (AF SNSPDs) are crucial in applications such as light detection and ranging, quantum computing, and quantum communication.