Incredibly thin, hollow wires made from gallium and nitrogen can produce laser beams that are hollow with a ring-shaped cross-section, and that could be used to create optical fibres out of thin air
Incredibly thin, hollow wires made from gallium and nitrogen can produce laser beams that are hollow with a ring-shaped cross-section, and that could be used to create optical fibres out of thin air Incredibly thin, hollow wires made from gallium and nitrogen can produce laser beams that are hollow with a ring-shaped cross-section, and that could be used to create optical fibres out of thin air