自引率: 15.3%
被引量: 129224
通过率: 暂无数据
审稿周期: 1.6
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国人发稿量: 1269
投稿须知/期刊简介:
Published by Optical Society of America. ISSN: 1094-4087.<br><br>Optics Express is the world''''s first international all-electronic journal of optics. Published bi-weekly, Optics Express offers OSA quality, rapid publication of original, peer-reviewed articles in all fields of optical science and technology. Color graphics and audio or video features are included at no extra cost to the authors. This journal is freely and widely available to readers via the Internet.
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Infrared camera on a butterfly's wing.
Thermal cameras were constructed long ago, but working principles and complex technologies still limit their resolution, total number of pixels, and sensitivity. We address the problem of finding a new sensing mechanism surpassing existing limits of thermal radiation detection. Here we reveal the new mechanism on the butterfly wing, whose wing-scales act as pixels of an imaging array on a thermal detector. We observed that the tiniest features of a Morpho butterfly wing-scale match the mean free path of air molecules at atmospheric pressure - a condition when the radiation-induced heating produces an additional, thermophoretic force that deforms the wing-scales. The resulting deformation field was imaged holographically with mK temperature sensitivity and 200 Hz response speed. By imitating butterfly wing-scales, the effect can be further amplified through a suitable choice of material, working pressure, sensor design, and detection method. The technique is universally applicable to any nano-patterned, micro-scale system in other spectral ranges, such as UV and terahertz.
被引量：- 发表：2018
