Zang XiaoFei, Shi Cheng, Li Zhou, Chen Lin, Cai Bin, Zhu YiMing, Zhu HaiBin
Opt Express. 2014 Jan 13;22(1):582-92. doi: 10.1364/OE.22.000582.
The traditional transformation-based cloak seems like it can only hide objects by bending the incident electromagnetic waves around the hidden region. In this paper, we prove that invisible cloaks can be applied to realize the overlapped optics. No matter how many in-phase point sources are located in the hidden region, all of them can overlap each other (this can be considered as illusion effect), leading to the perfect optical interference effect. In addition, a singular parameter-independent cloak is also designed to obtain quasi-overlapped optics. Even more amazing of overlapped optics is that if N identical separated in-phase point sources covered with the illusion media, the total power outside the transformation region is N2I0 (not NI0) (I0 is the power of just one point source, and N is the number point sources), which seems violating the law of conservation of energy. A theoretical model based on interference effect is proposed to interpret the total power of these two kinds of overlapped optics effects. Our investigation may have wide applications in high power coherent laser beams, and multiple laser diodes, and so on.
传统的基于变换的隐身衣似乎只能通过使入射电磁波在隐藏区域周围弯曲来隐藏物体。在本文中，我们证明了隐身衣可用于实现重叠光学。无论有多少同相点源位于隐藏区域，它们都能相互重叠（这可被视为幻象效应），从而产生完美的光学干涉效应。此外，还设计了一种与奇异参数无关的隐身衣以获得准重叠光学。重叠光学更令人惊奇的是，如果N个相同的分离同相点源被幻象介质覆盖，变换区域外的总功率为N²I₀（而非NI₀）（I₀是单个点源的功率，N是点源数量），这似乎违反了能量守恒定律。提出了一个基于干涉效应的理论模型来解释这两种重叠光学效应的总功率。我们的研究可能在高功率相干激光束、多个激光二极管等方面有广泛应用。
