In their study, Ergin and his colleagues used photonic crystals with a structure that looks like piles of wood to make an invisibility device, or cloak.

埃尔金及其同事在研究中使用了一种光子晶体来制造隐形斗篷。这种光子晶体的结构看上去像成堆的木头。

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"The new device can cloak a much wider spectrum of waves--nearly limitless," senior researcher David R. Smith said in a statement.

资深研究员戴维·R. 史密斯在一份声明中说：“新装置能够遮挡范围更广的光波——接近于无限。”

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If such a device could be scaled up to the human-size world (far from certain, alas), it might be able to steer a bullet around a bulletproof cloak.

如果这种装置可以放大到人类世界的尺度，它就可以被用来制造防弹斗篷。

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"The cloak we demonstrated in 2006 as a kind of microwave device would be very poor, but this one gets us to something that could be potentially useful, " Prof Smith said.

BBC: Invisibility cloaking in 'perfect' demonstration