New breakthrough in diamond defect enhancement in single photon emission technology

Purdue University recently published a study in the journal Laser and Photon, which attached nanodiamonds containing nitrogen vacancy centers to metamaterials made of titanium nitride (TiN) and aluminum lanthanum nitride (AlxSc1-xN). Pumping with a laser enhances single-photon emission of metamaterials. This is a key step towards the development of quantum computer and quantum communication technology equipment. Metamaterials are artificial composite structures or composite materials with extraordinary physical properties not possessed by natural materials. The "supermaterials" developed to date include: "left-handed materials", photonic crystals, "supermagnetic materials" and the like. The application of metamaterials is very different from the original material preparation. In the past, what materials were made in nature, what materials can be manufactured, and the metamaterials are completely reversed. According to the specific application requirements for electromagnetic waves, the corresponding materials are manufactured accordingly. Functional material.

Dr. Alexander Kildishev said: "Experiments have shown that placing a single photon emitter based on nanodiamonds on the surface of a hyperbolic metamaterial can greatly enhance the generation of single photons. Single photon emitters can be used to develop room temperature CMOS compatible high efficiency single photons. source".

The nitrogen-vacancy center is an atomic-level defect in the diamond lattice, which is an adjacent void formed by a nitrogen atom replacing one carbon atom. Placing nanodiamonds containing nitrogen-vacancy centers on the surface of hyperbolic metamaterials not only enhances photon emission, but also alters the pattern of photon emission, which is critical in the development of quantum devices.

Future research work will likely include improvements to the system, using a combination of hyperbolic metamaterials and nano-antennas, optical waveguides to increase system efficiency and make the system more compact. Next, the researchers will improve the "spin characteristics" of the system, using nitrogen atom vacancies to study the optical contrast between the upper and lower states.

The work was done by researchers from Purdue University, the Russian Quantum Center, the Moscow Institute of Physics and Technology, the Lebedev Institute of Physics, and Photonic Nano-Meta Technologies Inc. (Translation: China Superhard Materials Network)

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