Over the past two decades, photonic-crystal surface-emitting lasers (PCSELs) have shown promise as a type of advanced semiconductor laser useful in defense- and aerospace-related applications. Typically, these devices are made with photonic crystal patterns that repeat across the area of the dev...
Source: [Phys.org](https://phys.org/news/2026-08-nonrepeating-photonic-crystal-enable-tunable.html)