Chinese Academy of Sciences Institute of Semiconductors breaks through the bottleneck of practical application of chiral lasers: photonic crystal+asymmetric pump achieves single chiral efficient emission
Time: 2025-08-21
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Chiral laser, as a novel light source with spiral polarization characteristics, has important application prospects in quantum optics, biosensing, optical communication and other fields due to its ability to accurately excite specific vibration modes of matter. However, for a long time, practical applications have faced two major "bottleneck" problems: first, the chirality of light is easily affected by environmental disturbances (such as temperature changes and structural defects), resulting in loss of chirality specificity and inability to accurately identify targets; The second issue is that traditional complex structures, such as vortex resonators, increase optical transmission losses, and laser efficiency is often below 20%, making it difficult to meet industrial needs. In response to these pain points, the team of academician Zheng Wanhua of the Institute of Semiconductor of the Chinese Academy of Sciences recently proposed a new method of chiral laser emission based on photonic crystals. Through the combination strategy of "circular active photonic crystals+asymmetric pump", the single chiral laser emission was successfully realized, and the transmission efficiency was improved to more than 60%, which was a key step for the practical application of chiral lasers.
