Researchers from Stanford University in US created the technology that may someday serve as the basis for quantum communication.
In the physics of quantum communication, standard lasers are actually not useful for secure communication because they emit what is called 'classical' light.
Data eavesdroppers could extract any data being carried via classical light without detection. In contrast, a quantum internet would be based on 'quantum' light, in which a single unit of light - a single photon - cannot be measured without being destroyed.
Therefore, an efficient source of quantum light would enable perfectly secure communication. Researchers have been working for years to develop various nanoscale lasers and quantum technologies that might help conventional computers communicate faster and more efficiently using light instead of electricity.
They realised that a modified nanoscale laser can be used to efficiently generate quantum light for communication. "The problem is that the quantum light is much weaker than the rest of the light coming from such a modified laser - it is difficult to pick up," said Jelena Vuckovic from Stanford University.