表面等离激元光互联

Optical wireless interconnect based on nanoantennas
a)
[2]
Lower loss Exhibit much less absorption and largely surpass the conventional plasmonic waveguide interconnect in propagation loss Miniaturization Maintain subwavelength confined energy guided in the waveguides and provide more on-chip space Tunability and Flexibility Directive and broadcast Broadband or frequency-selective
FIG. 3. (a) E-field intensity distribution of the optical wireless interconnect based on horn nanoantennas. (b) Directivity of the horn nanoantenna. (c) E-field distribution inside the waveguide at the receiving terminal.
FIG. 1. Comparison between an optical wireless nanolink and a regular plasmonic waveguide interconnect. (a) Sketch map (b) Connection loss
Leabharlann Baidu
FIG. 2. On-chip plasmonic sectoral horn nanoantennas References
Main researchers :
Pro. Min Qiu, Dr. Qiang Li, Yuanqing Yang, Hangbo Yang 仇旻教授，李强副教授，杨源清，杨航波
FIG.2. The energy density distributions at the cross section of nanowires at the 1550 nm wavelength for (a) guidingmode and (b) leaky-mode, respectively. (c) and (d) differ from (a) and (b) in a color bar with saturation.
表面等离激元光互联
Plasmonics for interconnect
Plasmonics is an exciting science which can bridge the size gap between electronics and photonics while retaining the advantages in bandwidth and operating speed. The carriers of information in plasmonic devices, i.e., surface plasmon-polaritons (SPPs) can be routed and manipulated beyond the diffraction limit and thus are being explored for their potential use in subwavelength guiding and other chip-scale technologies.
Mode behavior and single-guiding-mode conditions of 1D metal nanowire are firstly investigated. Guiding mode has a cutoff radius for wavelength longer than 615 nm! To support guiding mode at l=1550 nm, the nanowire radii should be smaller than 34 nm. For larger radii, only leaky modes exist. The leaking modes typically have longer propagation lengths (and larger mode areas) compared with the guiding modes!!
Plasmonic wave propagation in silver nanowires
[1]
FIG.1. Schematic diagram and SEM image of a 1D metal nanowire with a radius of r placed on a SiO2 substrate (n0=1.45, n1=1)
FIG.3. (a) Effective index neff, (b) cutoff wavelength, (c) propagation length δ and (d) mode area Aeff versus wavelength for varying silver nanowire radii. The dashed lines denote the boundaries between guiding-modes and leaky-modes.
FIG.4. On-chip integrated photonic circuits for optical wireless interconnect
[1] Q. Li et. al, “Plasmonic wave propagation in silver nanowires: guiding modes or not?”, Opt. Express 21, 8587-8595 (2013) [2] Y. Q. Yang et al., “Plasmonic sectoral horn nanoantennas”, Opt. Lett. 39, 3204-3207 (2014)