Nonrepeating aperiodic photonic crystal structures significantly improve semiconductor laser wavelength tunability/ operational stability

https://phys.org/news/2026-08-nonrepeating-photonic-crystal-enable-tunable.html

"photonic-crystal surface-emitting lasers rely on rigid, repeating nanoscale patterns controlling/ directing light emission perpendicular to chip... overcome replacing with non-repeating, quasi-periodic, adjustable with feedback: optical beam divergence/ output coupling... aerospace, defense, telecom, sensing, optical communication"