Quantum information technology is a new information technology based on quantum mechanics, which encodes, computes and transmits the physical information contained in quantum system. The development and application of quantum information technology will bring us into the "quantum age", and realize higher work efficiency, more secure communication methods and more convenient and green lifestyle.

The efficiency of communication between quantum systems depends on their ability to interact with light. However, it is very difficult to find a material that can take full advantage of the quantum properties of optical.