We report on an experimental demonstration of light transfer in an engineered triple-well optical waveguide structure which provides a classic analog of coherent tunneling by adiabatic passage (CTAP) recently proposed for coherent transport in space of neutral atoms or electrons among tunneling-coupled optical traps or quantum wells [A. D. Greentree et al., Phys. Rev. B 70, 235317 (2004); K. Eckert et al., Phys. Rev. A 70, 023606 (2004)]. The direct visualization of CTAP wave-packet dynamics enabled by our simple optical system clearly shows that in the counterintuitive passage scheme light waves tunnel between the two outer wells without appreciable excitation of the middle well.
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机译：我们报告了在工程化的三阱光波导结构中进行光传输的实验演示，该结构提供了绝热通道（CTAP）的相干隧穿的经典模拟，最近提出了用于在隧穿耦合光阱之间的中性原子或电子空间进行相干传输的方法或量子阱[A. D.Greentree等，物理学。 B 70，235317（2004）; K.Eckert等，Phys。 Rev.A 70，023606（2004）]。通过我们简单的光学系统实现的CTAP波包动力学的直接可视化清楚地表明，在违反直觉的通道方案中，光波在两个外井之间隧穿，而没有中间井的明显激发。
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