中国物理B ›› 2014, Vol. 23 ›› Issue (3): 37301-037301.doi: 10.1088/1674-1056/23/3/037301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Unidirectional emissions from dielectric photonic circuits decorated with plasmonic phased antenna arrays

丁伟, 陈宇辉, 李志远   

  1. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2013-10-07 修回日期:2013-11-07 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB632704), the National Natural Science Foundation of China (Grant Nos. 11204366 and 61275044), and the Science Foundation of Chinese Academy of Sciences (Grant No. Y1K501DL11).

Unidirectional emissions from dielectric photonic circuits decorated with plasmonic phased antenna arrays

Ding Wei (丁伟), Chen Yu-Hui (陈宇辉), Li Zhi-Yuan (李志远)   

  1. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2013-10-07 Revised:2013-11-07 Online:2014-03-15 Published:2014-03-15
  • Contact: Ding Wei E-mail:wding@iphy.ac.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB632704), the National Natural Science Foundation of China (Grant Nos. 11204366 and 61275044), and the Science Foundation of Chinese Academy of Sciences (Grant No. Y1K501DL11).

摘要: Thanks to resonant characteristics of metallic nanoparticles, optical waves scattered from plasmonic nanoantennae can be well tailored in both amplitude and phase. We numerically demonstrate that, by varying the lengths and the lateral positions of gold nanorods in vicinity of a silicon waveguide, unidirectional emissions with typical forward–backward contrast ratio of 15 dB and directivity of 12 dB can be acquired in a plasmonic phased antenna array with sub-wavelength device length. The properties, i.e., the emission directionality and the size compactness, can be employed to control the far-field radiation pattern from a dielectric photonic circuit. Moreover, by altering the orientations of the dielectric waveguides decorated with plasmonic phased antenna arrays, we propose wireless light transportations in a layered photonic infrastructure, which may have applications in high-density photonic integrations.

关键词: surface plasmons, optical properties of nanoparticles, optical structures, light scattering

Abstract: Thanks to resonant characteristics of metallic nanoparticles, optical waves scattered from plasmonic nanoantennae can be well tailored in both amplitude and phase. We numerically demonstrate that, by varying the lengths and the lateral positions of gold nanorods in vicinity of a silicon waveguide, unidirectional emissions with typical forward–backward contrast ratio of 15 dB and directivity of 12 dB can be acquired in a plasmonic phased antenna array with sub-wavelength device length. The properties, i.e., the emission directionality and the size compactness, can be employed to control the far-field radiation pattern from a dielectric photonic circuit. Moreover, by altering the orientations of the dielectric waveguides decorated with plasmonic phased antenna arrays, we propose wireless light transportations in a layered photonic infrastructure, which may have applications in high-density photonic integrations.

Key words: surface plasmons, optical properties of nanoparticles, optical structures, light scattering

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures) 42.25.Fx (Diffraction and scattering)