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Adiabatic far-field sub-diffraction imaging

机译:绝热远场亚衍射成像

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The limited resolution of a conventional optical imaging system stems from the fact that the fine feature information of an object is carried by evanescent waves, which exponentially decays in space and thus cannot reach the imaging plane. We introduce here an adiabatic lens, which utilizes a geometrically conformal surface to mediate the interference of slowly decompressed electromagnetic waves at far field to form images. The decompression is satisfying an adiabatic condition, and by bridging the gap between far field and near field, it allows far-field optical systems to project an image of the near-field features directly. Using these designs, we demonstrated the magnification can be up to 20 times and it is possible to achieve sub-50?nm imaging resolution in visible. Our approach provides a means to extend the domain of geometrical optics to a deep sub-wavelength scale.
机译:常规光学成像系统的有限分辨率源于以下事实:物体的精细特征信息由e逝波携带,e逝波在空间中呈指数衰减,因此无法到达成像平面。我们在这里介绍一种绝热透镜,该透镜利用几何共形表面来调解远场中缓慢减压的电磁波的干扰,以形成图像。减压满足绝热条件,并且通过弥合远场和近场之间的间隙,它允许远场光学系统直接投影近场特征的图像。使用这些设计,我们证明了放大倍数可以达到20倍,并且有可能在可见光范围内达到50纳米以下的成像分辨率。我们的方法提供了一种将几何光学领域扩展到深亚波长范围的方法。

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