标题：Breaking the Energy-Symmetry-Based Propagation Growth Blockade in Magneto-Optical Rotation
作者：Zhu, Chengjie; Zhou, Feng; Zhu, Eric Y.; Hagley, E. W.; Deng, L.
作者机构：[Zhu, Chengjie] Tongji Univ, Sch Phys Sci & Engn, MOE, Key Lab Adv Microstruct Mat, Shanghai 200092, Peoples R China.; [Zhou, Feng; Zhu, Eric Y.; Ha 更多
通讯作者：Deng, L;Deng, L
通讯作者地址：[Deng, L]NIST, Gaithersburg, MD 20899 USA;[Deng, L]Shandong Univ, Adv Res Ctr Opt, Qingdao 266237, Shandong, Peoples R China.
来源：PHYSICAL REVIEW APPLIED
摘要：The magneto-optical polarization rotation effect has myriad applications in many research areas spanning the scientific spectrum, including space and interstellar research, nanotechnology, material science, biomedical imaging, and subatomic particle research. In the nonlinear magneto-optical rotation (NMOR) effect, the angle of rotation of a linearly polarized optical field in a magnetized medium is dependent upon its intensity. However, typical NMOR signals of conventional single-beam Lambda-scheme atomic magnetometers are peculiarly small, requiring sophisticated magnetic shielding and high-frequency phase-sensitive detection. Here, we show the presence of an energy-symmetry-based propagation growth blockade that undermines the NMOR effect in conventional single-beam Lambda-scheme atomic magnetometers. We further demonstrate, both experimentally and theoretically, an inelastic wave-mixing technique that breaks this NMOR blockade, resulting in more-than-2-orders-of-magnitude enhancement of the NMOR signal power amplitude that cannot be achieved with conventional single-beam Lambda-scheme atomic magnetometers. This technique, demonstrated here with substantially reduced light intensities at near-room temperatures, may lead to many applications, especially in the field of biomagnetism and high-resolution low-field magnetic imaging.