Department of Applied Mathematics, University of Crete, 71409 Heraklion, Crete, Greece.
Opt Lett. 2010 Dec 1;35(23):4045-7. doi: 10.1364/OL.35.004045.
We introduce a new class of (2+1)D spatial and (3+1)D spatiotemporal waves that tend to autofocus in an abrupt fashion. While the maximum intensity of such a radial wave remains almost constant during propagation, it suddenly increases by orders of magnitude right before its focal point. These waves can be generated through the use of radially symmetric Airy waves or by appropriately superimposing Airy wave packets. Possible applications of such abruptly focusing beams are also discussed.
我们引入了一类新的（2+1）维空间和（3+1）维时空波，它们倾向于以突然聚焦的方式自聚焦。虽然这种径向波的最大强度在传播过程中几乎保持不变，但在焦点之前，它会突然增加几个数量级。这些波可以通过使用径向对称的艾里波或通过适当叠加艾里波包来产生。还讨论了这种突然聚焦光束的可能应用。
