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A temporal cloak at telecommunication data rate

机译：电信数据速率的暂时隐身

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摘要

Through advances in metamaterials—artificially engineered media with exotic properties, including negative refractive index—the once fanciful invisibility cloak has now assumed a prominent place in scientific research. By extending these concepts to the temporal domain, investigators have recently described a cloak which hides events in time by creating a temporal gap in a probe beam that is subsequently closed up; any interaction which takes place during this hole in time is not detected. However, these results are limited to isolated events that fill a tiny portion of the temporal period, giving a fractional cloaking window of only about 10~(-4) per cent at a repetition rate of 41 kilohertz (ref. 15)—which is much too low for applications such as optical communications. Here we demonstrate another technique for temporal cloaking, which operates at telecommunication data rates and, by exploiting temporal self-imaging through the Talbot effect, hides optical data from a receiver. We succeed in cloaking 46 per cent of the entire time axis and conceal pseudorandom digital data at a rate of 12.7 gigabits per second. This potential to cloak real-world messages introduces temporal cloaking into the sphere of practical application, with immediate ramifications in secure communications.
机译：通过超材料（具有负折射率的具有奇异特性的人工工程介质）的发展，曾经幻想的隐形斗篷现已在科学研究中占据重要地位。通过将这些概念扩展到时域，研究人员最近描述了一种斗篷，该斗篷通过在随后关闭的探测光束中产生时间间隙来及时隐藏事件。没有检测到在此时间间隔内发生的任何交互。但是，这些结果仅限于在时间周期的一小部分内发生的孤立事件，在41 kHz的重复频率下，分数隐藏窗口仅占10％（-4）％（参考15）。对于光通信之类的应用来说太低了。在这里，我们演示了另一种用于时间隐身的技术，该技术以电信数据速率运行，并通过Talbot效应利用时间自成像技术，从接收器中隐藏了光学数据。我们成功掩盖了整个时间轴的46％，并以每秒12.7吉比特的速率隐藏伪随机数字数据。这种隐藏真实世界消息的潜力将暂时隐藏引入了实际应用领域，并在安全通信中带来了直接后果。

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  • 来源
    《Nature》 |2013年第7453期|205-208|共4页
  • 作者

    Joseph M. Lukens; Daniel E. Leaird; Andrew M. Weiner;

  • 作者单位

    School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA;

    School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA;

    School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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