• 文献标题:   Circular Polarization-Dependent Wavefront Control of Plasmons on Graphene
  • 文献类型:   Article
  • 作  者:   WU BL, ZHU BF, REN GB, JIAN SS
  • 作者关键词:   graphene plasmon, wavefront control, nanoantenna
  • 出版物名称:   IEEE PHOTONICS TECHNOLOGY LETTERS
  • ISSN:   1041-1135 EI 1941-0174
  • 通讯作者地址:   Beijing Jiaotong Univ
  • 被引频次:   2
  • DOI:   10.1109/LPT.2016.2577781
  • 出版年:   2016

▎ 摘  要

In this letter, we propose a method to control the wavefront of the graphene plasmons through changing the polarization direction of the circular polarized incidence. Illuminated by the circular polarized incident light, the plasmons are launched through the resonances of a column of nanoantenna pairs beneath graphene. By properly controlling the separation and orientation of antennas in each pair, the propagation direction of plasmons wavefront is no longer perpendicular to the column and the launching angle is also dependent on the circular polarization of incident light. By combining the nanoantenna arrays with their mirroring arrays, two-dimension biconvex or biconcave plasmon lens can be realized. Furthermore, the launching angle can be controlled by the incident wavelength, the phase gradient between adjacent nanoantenna pairs, and the graphene Fermi level. The proposed scheme may provide new possibilities in engineering plasmons wavefront on graphene through launching procedure.