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On-chip plasmon-induced transparency based on plasmonic coupled nanocavities.
Yu Zhu1, Xiaoyong Hu2, Hong Yang1
1State Key Laboratory for Mesoscopic Physics & Department of Physics, Peking University, Beijing 100871, People's Republic of China.
Scientific Reports
|January 18, 2014
Summary
Researchers demonstrate on-chip plasmon-induced transparency using a nanoscale plasmonic waveguide and nanocavity. This breakthrough enables ultrahigh-speed information processing with highly tunable optical properties.
Area of Science:
- Plasmonics
- Nanophotonics
- Quantum Optics
Background:
- On-chip plasmon-induced transparency is crucial for ultrahigh-speed information processing.
- Previous experimental realization using single meta-molecules in plasmonic circuits has been limited.
Purpose of the Study:
- To develop a simple and efficient strategy for on-chip plasmon-induced transparency.
- To achieve high tunability in the transparency window for plasmonic circuits.
Main Methods:
- Utilized a nanoscale U-shaped plasmonic waveguide side-coupled nanocavity pair.
- Employed organic polymer layers for tunability and a graphene cover layer for all-optical control.
Main Results:
- Achieved on-chip plasmon-induced transparency in a compact nanostructure.
- Demonstrated high tunability of the transparency window using polymer and graphene layers.
- Reduced feature size by over three orders of magnitude compared to previous reports.
Conclusions:
- The developed strategy offers a viable path towards ultrahigh-speed information processing chips.
- The nanostructure serves as a platform for studying nonlinear and quantum optics phenomena.
- Ultrafast all-optical tunability was realized through refractive index modulation.
