Source Image Squeezing and Field Tunneling for Propagating Light Beyond-Limit Focusing to Reach the Intermediate Zone

Hong, Jian; Wang, Ting Kai; Chen, Alexander Ewen; Li, Hsiang Nan; Chen, Kuan Ren

doi:10.1007/s11468-020-01319-z

Cited by 1 publication

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“…As a near-surface effect, light funneling is the main mechanism [ 4 , 5 , 6 , 10 , 11 , 12 ] for the extraordinary optical transmission phenomenon, in addition to surface plasmonics [ 2 , 3 , 4 , 5 , 10 , 11 ], and Fabry–Pérot resonance [ 4 , 5 , 6 , 10 , 11 , 12 ]. The charges accumulate at an interrupted surface [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ] as illuminated by the incident light and draw the wave energy into its vicinity due to diffraction effects. The interaction between the incident fields and the radiation fields generated by the accumulated charge causes the incident energy to flow into the enhanced opening.…”

Section: Introductionmentioning

confidence: 99%

Funneling of Oblique Incident Light through Subwavelength Metallic Slits

et al. 2022

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Light funneling determines how enhanced energy flows into subwavelength slits. In contrast to the previous research on oblique incident light, this study reveals that light funneling in the slits can be highly asymmetric, even at small angles. This mechanism is explained by polarized fields and charges, which are induced using Poynting vectors. It is shown that when light is obliquely incident to the slits perforated in a perfect electric conductor, asymmetrical fields and charges accumulate at the upper apex corners of the left (right) sides. When light is incident from the left (right) side, more (less) induced fields and charges accumulate in the left (right) slit corner so that the funneling width, area, and energy flow at the left (right) side increases (decreases).

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