A team led by Xie Yuanyang at King's College London has developed a technique that uses tens-of-nanometer-thick metal thin films, tiny nanospirals, and a few-nanometer-thick dielectric layer to directly emit high-purity chiral light carrying both spin angular momentum and orbital angular momentum by applying voltage and exploiting the quantum tunneling effect. This breakthrough overcomes the limitations of traditional methods for producing chiral light, which rely on bulky external equipment or complex specialized materials. The research employed a metal-insulator-metal sandwich structure, in which chiral nanospirals excite plasmon radiation of strongly chiral light, achieving an emission asymmetry factor of 0.8. The team also observed that the spin and orbital angular momentum are equal in magnitude but opposite in direction, and that the color and rotation direction of the light can be precisely tuned by adjusting the geometric dimensions of the structure. This technology is compatible with modern semiconductor processes, highly scalable, and offers the advantages of low power consumption and ultra-compactness. It holds significant application value in fields such as AR/VR displays, quantum information processing, photochemistry, wearable devices, high-density integrated photonic chips, drug development, and biosensing. At the same time, it bridges the cross-disciplinary connection between quantum tunneling and nanophotonics, opening a new direction for next-generation ultra-miniature optical chips.