Ning Shaohuan, Lu Jinxian, Liang Shun, Feng Yuan, Li Changbiao, Zhang Zhaoyang, Zhang Yanpeng
Opt Lett. 2021 Oct 1;46(19):5035-5038. doi: 10.1364/OL.438489.
We demonstrate the Talbot effect of an electromagnetically induced square photonic lattice formed under the electromagnetically induced transparency (EIT) condition both experimentally and theoretically in a three-level atomic configuration. The two-dimensional lattice patterns result from the diffraction of a Gaussian probe field traveling through the vapor cell, in which the refractive index is modulated by a coupling field with a two-dimensional periodic intensity distribution generated by a spatial light modulator. The experimental observations are consistent with the theoretical predictions. This investigation not only provides a new avenue for producing desired electromagnetically induced photonic lattices beyond the commonly adopted multi-beam interfering method but also broadens studies of electromagnetically induced Talbot effect to two-dimensional space.
我们在三能级原子构型中通过实验和理论证明了在电磁诱导透明（EIT）条件下形成的电磁诱导方形光子晶格的塔尔博特效应。二维晶格图案是由穿过蒸汽室的高斯探测场的衍射产生的，其中折射率由具有二维周期性强度分布的耦合场调制，该耦合场由空间光调制器产生。实验观测结果与理论预测一致。这项研究不仅为超越常用的多光束干涉方法产生所需的电磁诱导光子晶格提供了一条新途径，还将电磁诱导塔尔博特效应的研究扩展到二维空间。
