Optical negative index meta-materials at near-ir wavelength
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Optical negative index meta-materials at near-ir wavelength
The optical negative refractive index metamaterials (NIMs) are nanostructure-patterned artificial materials, which have both negative permittivity and permeability in the same frequency range, hence a negative refractive index. We have designed, fabricated and characterized various optical NIMs at near-IR (i.e. 1.55 m) range. Moreover, we also demonstrated the first tunable NIM, ultra-fast modulation of NIMs and the first third harmonic generation (THG) based on NIMs at near-IR range. Due to their unique properties, NIMs have a potential of applications, including e.g. sub-wavelength imaging, compact, efficient nano-photonic devices and ultra-high resolution nanolithography.
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