Trapping these systems in periodic potential wells made by intersecting light beams yields optical lattices in which atoms behave as electrons in metals, albeit at a quite different scale.

在周期势阱中研究这个系统，发现相干光产生光学晶格能够使原子具有了金属中的自由离子的性质，尽管看起来截然不同。

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Scales on the wings have multiple layers of cuticle with varying nanometer-scale spacings between them that produce colors by optical interference.

它翅膀上的鳞屑是由多层的角质层构成，角质层之间是不同的纳米级间隔空间，产生的光学干干涉让我们看到彩虹一样的色彩。

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The idea is to successfully demonstrate scale reduction so complex optical functions can be included in a single chip.

这个主意成功地证明可以将光学功能如此复杂的比例缩减包括在一片晶片上。

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"Theoretically if you construct the elements we've made at terahertz frequencies, make them even smaller and then scale them up to optical frequencies, you could have perfect lensing at those frequencies, " said co-author Dr Willie Padilla of the University of California, San Diego.

BBC: Last Updated: Monday, 8 March 2004, 09:03 GMT

Worse still, a privacy group called Privacy International has identified British, American, German and Israeli companies who are exporting spooky technologies like DPI hardware and equally sophisticated software products like "optical cyber solutions" that enable mass surveillance of large scale populations, to repressive regimes in the Middle East such as Yemen, Egypt, Syria and Iran.

CNN: Opinion: In the digital age, everyone is becoming a spook