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Imaging with subwavelength resolution by a generalized superlens at infrared wavelengths

机译:广义超透镜在红外波长下以亚波长分辨率成像

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摘要

We demonstrate experimentally negative refraction by a photonic crystal prism and imaging of a point source by a photonic crystal slab at 1.5 (mu)m wavelength. The photonic crystal structures were nanofabricated in a InGaAsP/InP heterostructure platform, and optical characterization was performed using a near-field scanning optical microscope. By designing a suitable lens surface termination, an image spot size of 0.12(lambda)~(2) was achieved, demonstrating superlens imaging with subwavelength resolution well below-Abbe's diffraction limit (0.5(lambda)~(2)).
机译:我们证明了由光子晶体棱镜在实验上产生的负折射,以及由光子晶体平板在1.5μm波长处的点源成像。在InGaAsP / InP异质结构平台上纳米加工光子晶体结构,并使用近场扫描光学显微镜进行光学表征。通过设计合适的透镜表面端接,可以实现0.12λ〜(2)的图像光斑大小,这表明超透镜成像的亚波长分辨率远低于阿贝衍射极限(0.5λ〜(2))。

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