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We perform an entanglement distillation protocol on pure and mixed states using optical metamaterials composed of gold nano-antennas and measure the density matrices by quantum-state tomography. The fidelity is improved from 0.85 to 0.97.
Hybrid wishpering-gallery-mode resonators were made by depositing a ploycrystalline lihtiiim noibate film onto silica resonators. Efficient coupling with tapered fiber and all-optical modulation were realized in these resonators.
Optical signals are increasingly used to transfer and process information, because of their high speed, bandwidth, and propagation distances in transparent optical networks. However, the miniaturization of photonic devices faces a hard block: the diffraction limit. One proposed means to go beyond this limit is to use surface plasmons polaritons (SPPs), charge density waves at the interface between...
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