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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Tunable Terahertz Hybrid Metal-Graphene Plasmons
Mohammad M Jadidi1, Andrei B Sushkov2, Rachael L Myers-Ward3
1Institute for Research in Electronics & Applied Physics, University of Maryland , College Park, Maryland 20742, United States.
Nano Letters
|September 24, 2015
Summary
Researchers discovered new plasmon resonances by connecting graphene to metal. This breakthrough enables tunable plasmonic channels for practical graphene terahertz optoelectronics devices.
Area of Science:
- Condensed matter physics
- Materials science
- Optoelectronics
Background:
- Plasmon resonances are crucial for optoelectronic devices.
- Graphene's unique properties offer potential for terahertz applications.
- Integrating tunable plasmonics with electrical contacts has been a challenge.
Purpose of the Study:
- To report a novel type of plasmon resonance in graphene-metal systems.
- To demonstrate the potential for tunable plasmonic channels in devices.
- To advance the development of graphene-based terahertz optoelectronics.
Main Methods:
- Theoretical modeling of plasmon behavior.
- Experimental fabrication of graphene-filled apertures in conductive layers.
- Measurement of resonant absorption and transmission spectra.
Main Results:
- Observation of a new plasmon resonance at graphene-metal interfaces.
- Demonstration of anomalously high resonant absorption and transmission.
- Validation of tunable plasmon resonances in subwavelength structures.
Conclusions:
- The discovered plasmon resonances are key for practical graphene terahertz devices.
- This work provides essential components for terahertz filters, oscillators, detectors, and modulators.
- The findings pave the way for advanced tunable optoelectronic functionalities.
