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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
A double-strip plasmonic waveguide coupled to an electrically driven nanowire LED.
You-Shin No1, Jae-Hyuck Choi, Ho-Seok Ee
1Department of Physics, Korea University, Seoul 136-701, Republic of Korea.
Nano Letters
|January 18, 2013
Summary
We coupled an electrically driven nanowire light-emitting diode (LED) to a plasmonic waveguide. This efficiently focuses light into a subwavelength spot, advancing ultracompact photonic circuits.
Area of Science:
- Photonics
- Nanotechnology
- Optoelectronics
Background:
- Plasmonic waveguides offer subwavelength light confinement.
- Integrating light sources with plasmonic devices is challenging.
Purpose of the Study:
- To demonstrate efficient coupling between an electrically driven nanowire LED and a plasmonic waveguide.
- To achieve subwavelength focusing of light using this integrated system.
Main Methods:
- Fabrication of a GaAs nanowire LED.
- Integration with a double-strip gold plasmonic waveguide with a tapered end.
- Characterization using polarization-resolved imaging and spectroscopy.
- Numerical simulations for mode analysis.
Main Results:
- Successful coupling of NW LED emission to a plasmonic waveguide mode.
- Propagation of light through the waveguide.
- Focusing of light into a subwavelength spot of surface plasmon polaritons.
- Experimental results validated by numerical simulations showing symmetric plasmonic mode excitation.
Conclusions:
- Demonstrated efficient integration of an electrically driven NW LED with a plasmonic waveguide.
- Achieved subwavelength light focusing, crucial for miniaturization.
- Represents significant progress towards practical ultracompact photonic integrated circuits.
