论文标题
通过高折射率电介质的纤维高分辨率光子纳米夹
On-fiber high-resolution photonic nanojets via high refractive index dielectrics
论文作者
论文摘要
在此手稿中，我们通过使用高反射索引中尺度的介电介质在光纤末端使用高传向的波长（λ0=1.55μm）在电信波长（λ0=1.55μm）处的高空间分辨率聚焦。我们的方法利用光子纳米夹（PNJS）实现高强度，空间狭窄的焦点。考虑二维（2D）和3维（3D）配置，分别使用高指数中尺度的圆柱形和球形介电作用，对设备的响应进行了详细评估。可以通过简单地将其2D/3D圆柱/球形输出曲线截断，显示了如何将PNJS转移到中尺度高索引介电介电介电的输出表面。使用此设置，使用2D/3D工程尺度的介电介质颗粒获得具有较高横向分辨率的PNJ，该介质颗粒以FWHM的一半最高=0.28λ0（2D截断的介电），并获得全宽度的宽度，而FWHMY =0.17λ0和FWHMX =0.17λ0和FWHMX = 0.21PIEL（3DDDDD）。所提出的结构在需要近场高空间分辨率的应用中可能具有潜力，例如在传感和成像系统中。
In this manuscript, we present high spatial resolution focusing of electromagnetic waves at telecommunication wavelengths (λ0 = 1.55 μm) by using high-refractive index mesoscale dielectrics placed at the end of an optical fiber. Our approach exploits photonic nanojets (PNJs) to achieve high-intensity, spatially narrow focal spots. The response of the device is evaluated in detail considering 2-dimensional (2D) and 3-dimensional (3D) configurations using high-index mesoscale cylindrical and spherical dielectrics, respectively, placed on top of an optical fiber. It is shown how the PNJs can be shifted towards the output surface of the mesoscale high-index dielectric by simply truncating its 2D/3D cylindrical/spherical output profile. With this setup, a PNJ with a high transversal resolution is obtained using the 2D/3D engineered mesoscale dielectric particles achieving a Full-Width at Half-Maximum of FWHM = 0.28λ0 (2D truncated dielectric), and FWHMy = 0.17λ0 and FWHMx = 0.21λ0 (3D truncated dielectric). The proposed structure may have potential in applications where near-field high spatial resolution is required, such as in sensing and imaging systems.
