CST – Computer Simulation Technology

Title:
Compact dipole nanoantenna coupler to plasmonic slot waveguide
Author(s):
Andrei Andryieuski, Radu Malureanu, Giulio Biagi, Tobias Holmgaard, Andrei Lavrinenko
Source:
OPTICS LETTERS
Vol./Issue/Date:
Volume: 37, Issue: 6, 15 March 2012
Year:
2012
Page(s):
1124-1126
Abstract:
Optical nanoantennas can be used for coupling radiation to or from waveguides in analogy to micro- and radio-wave systems. In this letter we provide a systematic description of the design approaches for a coupler to a plasmonic slot waveguide in the telecom range around 1.55 µm with realistic excitation from a lensed optical fiber. We show that the best coupling efficiency of 26% can be achieved by utilizing a dipole antenna with side and bottom reflectors, and such coupling efficiency is 185 times larger than for the bare waveguide. The nanoantenna coupler provides a compact interface between an optical fiber and a plasmonic slot waveguide for future optical integrated circuits.
Document:

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