论文标题
在超对比度介电微粒的倾斜照明下，镜面反射光子钩的产生
Specular-reflection photonic hook generation under oblique illumination of a super-contrast dielectric microparticle
论文作者
论文摘要
在我们的作品中报道了在中尺度介电粒子上克服平面光波衍射上局部光子纳米夹的临界条件的可能性，这通常被称为“折射率对比度少于两个”。为此，提出了基于放置在扁平镜附近的超对比度微粒（N〜2）的“反射模式”中光子纳米喷气机的新几何方案。在本文中，通过数值FDTD计算2D和3D电介质微粒（圆柱体，球）的光场结构的计算，我们将考虑因素扩展到了倾斜粒子 - 液体照明的情况，并呈现出在被考虑的光子几何形状中产生的新物理现象。这些是倾斜颗粒照明后的准重力光子纳米喷气机的产生，并以“镜面反射光子钩”（S-Hook）的形式形成光场定位的曲线空间空间区域。通过更改光入射率和平面镜旋转的方向来分析S钩形成的两个不同的机制。
The possibility of overcoming the critical condition for localized photonic nanojet upon plane optical wave diffraction at mesoscale dielectric particle, which is commonly known as "the refractive index contrast is less than two", was recently reported in our works. To this end, the novel geometrical scheme of photonic nanojet generation in "reflection mode" was proposed based on a super-contrast microparticle (n~2) placed near a flat mirror. In this paper, through the numerical FDTD calculations of optical near-field structure of 2D and 3D dielectric microparticles (cylinder, sphere) we extend our considerations to the case of oblique particle-at-mirror illumination and present new physical phenomena arising in the considered photonic geometry. Those are the generation of a quasi-retrograde photonic nanojet following the inclined particle illumination and the formation of a curvilinear spatial region of optical field localization in the form of a "specular reflection photonic hook" (s-Hook). Two different regimes of s-Hook formation are analyzed by changing the direction of light incidence and by flat mirror rotation.
