This can be fabricated using an standard semiconductor manufacturing process
The First In The World! University Of Electronic Science And Technology Of China Team Develops Gallium Nitride Quantum Light Source Chip
Reporters learned from the Information and Quantum Laboratory of the University of Electronic Science and Technology of China that the laboratory's research team cooperated with Tsinghua University and the Shanghai Institute of Microsystems and Information Technology of the Chinese Academy of Sciences to develop a gallium nitride quantum light source chip for the first time in the world. This is another important progress made by the University of Electronic Science and Technology of China's "Ginkgo-1" urban quantum Internet research platform. The relevant results were recently published in "Physical Review Letters".
It is understood that the quantum light source chip is the core device of the quantum Internet. It can be regarded as a "quantum light bulb" that lights up the "quantum room", allowing Internet users to have the ability to interact with quantum information.
Through iterative electron beam exposure and dry etching processes, the research team overcame technical problems such as high-quality gallium nitride crystal film growth, waveguide sidewall and surface scattering losses, and applied gallium nitride materials to quantum light source chips for the first time in the world. .
At present, quantum light source chips are mostly developed using materials such as silicon nitride. In contrast, the output wavelength range of gallium nitride quantum light source chips has increased from 25.6 nanometers to 100 nanometers, and can be developed towards monolithic integration.
"This means that the 'quantum light bulb' can light up more rooms." Zhou Qiang, professor at the Institute of Basic and Frontier Research at the University of Electronic Science and Technology of China and director of the Quantum Internet Frontier Research Center at Tianfu Jiangxi Laboratory, explained that more wavelength resources can enable more Users use different wavelengths to access the quantum Internet network.
Not long ago, the team increased the capacity of solid-state quantum storage in the optical fiber communication band to 1,650 modes, breaking the world record in this field. A series of research progress will further provide key components for the construction of large-capacity, long-distance, and high-fidelity quantum Internet.
