GaN-based vertical-cavity surface-emitting lasers (VCSELs) are promising for displays, sensing and optical communication, but improving efficiency remains challenging. Researchers have now shown that "cavity tuning," which controls resonance wavelength, strongly affects laser performance. By an...

Source: [Phys.org](https://phys.org/news/2026-06-cavity-strategy-blue-vertical-surface.html)

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