Abstract
Confining near-infrared (NIR) and mid-infrared (MIR) radiation (1–10 μm) at the nanoscale is one of the main challenges in photonics. Thanks to the transparency of silicon in the NIR-MIR range, opt...
Highlights
Near- and mid-infrared radiation (1−10 μm) is often selected as the ideal framework for the design of optoelectronics systems
Despite the fact that each configuration optimizes one aspect at the expense of another, the best trade-off has been achieved in the case of a graphene/SiO2 hyperbolic metamaterial (HMM) working across the dielectric singularity
We provide numerical evidence that the system can be used as a tunable near-field perfect lens with a resolving power down to λ/1660 in the MIR range that allows to image 3 nm objects illuminating at a 4985 nm wavelength
Summary
Near- and mid-infrared radiation (1−10 μm) is often selected as the ideal framework for the design of optoelectronics systems This is mainly due to the transparency of silicon in this spectral range.[1−3] Silicon represents, often the material of choice in optoelectronics due to its low cost and availability and since its use allows one to fabricate devices via the broadly used CMOS process. It is well known that radiation with wavelength longer than 900 nm can efficiently penetrate biological tissues as blood and skin.[6,7] Techniques like Fourier transform infrared spectroscopy (FTIR) or Raman scattering involving radiation in the MIR range are very common in biology since many bio-fingerprints like molecular vibrations lie in this spectral region.[8−11] interesting is the so-called “second near-infrared (NIR-II) window”
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