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Designing All-Electric Subwavelength Metasources for Near-Field Photonic Routings
Physical Review Letters ( IF 8.385 ) Pub Date : 
Yang Long; Jie Ren; Zhiwei Guo; Haitao Jiang; Yuqian Wang; Yong Sun; Hong Chen

The spatially confined evanescent modes in near-field photonics have been proved to be highly desirable in broad practical scenarios ranging from robust information communications to efficient quantum interactions. However, the feasible applications of these photonics modes are limited due to the lack of fundamental understandings and feasible directional coupling approaches at sub-wavelengths. Here, we propose all-electric near-field metasource in subwavelength scale without mimicking the polarization features or introducing magnetic dipoles. The near-field selective functions of metasources corresponding to time-reversal, parity-time and parity symmetries of their inner degree of freedom are exemplified in various optical systems. We experimentally demonstrate the efficient near-field photonic routing achieved in waveguides composed of two kinds of single-negative metamaterials.} Our work furthers the understandings about optical near-field symmetry and feasible engineering approaches of directional couplings, which would pave the way for promising integrated near-field photonics devices.
更新日期:2020-09-15

 

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