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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Terahertz imaging employing graphene modulator arrays
Berardi Sensale-Rodriguez1, Subrina Rafique, Rusen Yan
1Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA. bsensale@nd.edu
Optics Express
|February 8, 2013
Summary
Arrays of graphene electro-absorption modulators offer a new path for terahertz cameras. These modulators achieve over 50% THz wave reflectance modulation, paving the way for low-cost, video-rate imaging systems.
Area of Science:
- Terahertz (THz) technology
- Optoelectronics
- Materials science
Background:
- Terahertz imaging systems require efficient modulators for high-resolution detection.
- Graphene's unique electronic properties make it a promising material for optoelectronic devices.
Purpose of the Study:
- To propose and demonstrate graphene electro-absorption modulators for electrically reconfigurable terahertz cameras.
- To achieve high modulation depth in terahertz wave reflectance using graphene.
Main Methods:
- Fabrication of graphene electro-absorption modulators.
- Experimental characterization of terahertz wave modulation.
- Development of a 4x4 pixel array prototype.
Main Results:
- Achieved > 50% modulation of terahertz wave reflectance.
- Demonstrated potential for modulation depth approaching 100%.
- Showcased electrically reconfigurable patterns for terahertz imaging.
Conclusions:
- Graphene modulators are viable for terahertz camera applications.
- The technology enables reliable, low-cost, video-rate terahertz imaging.
- Single-detector systems are feasible with this approach.
