Schematic image of GaN hollow nanowires on a sapphire substrate.

An artist’s impression of a donut-shaped laser light-emitting hollow nanowire

Masato Takiguchi et al./ACS Photonics/American Chemical Society 2024

Small, hollow wires can create a donut shape. Laser beam which can be used to extract small objects or transmit information.

Conventional lasers typically create beams that appear as a small point of light when they hit a surface. But for some new communication technologies that use light to transmit information, it may be better to use lasers that create a hollow beam like a drinking straw, which emits light when it hits a surface. appear as circles.

Such a hollow laser…