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Tunable plasmon-induced transparency in hybrid waveguide-magnetic resonance system
Applied Optics
|May 14, 2015
Summary
We demonstrate a novel hybrid system exhibiting double plasmon-induced transparency (PIT) in infrared light. This system offers ultra-narrow transparency windows for advanced optical sensing and switching applications.
Area of Science:
- Optics and Photonics
- Metamaterials
- Nanophotonics
Background:
- Plasmon-induced transparency (PIT) is a quantum interference effect.
- Hybrid systems combining waveguides and plasmonic resonators offer unique optical properties.
Purpose of the Study:
- To design and investigate a hybrid waveguide-magnetic resonance system for enhanced optical functionalities.
- To achieve double PIT and explore its tunability and sensing capabilities.
Main Methods:
- Fabrication of a hybrid structure with periodically arranged split ring resonators (SRRs) on a waveguide layer.
- Experimental and theoretical analysis of light interaction within the hybrid system.
- Investigation of the influence of incident angle on PIT resonance.
Main Results:
- Observation of double plasmon-induced transparency (PIT) due to destructive interference.
- Achieved an ultra-narrow PIT window with a full width at half maximum (FWHM) of 7 nm at 1.448 μm.
- Demonstrated dynamic tunability of PIT resonance by incident angle.
- Obtained a high group index of up to 100 and excellent sensing performance (640 nm/RIU, FOM of 64).
Conclusions:
- The proposed hybrid system effectively generates double PIT with a high-quality factor.
- The system shows significant potential for applications in optical sensing, optical switching, and slow-light devices.
