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Modulated scattering technique in the terahertz domain enabled by current actuated vanadium dioxide switches
W A Vitale1, M Tamagnone2, N Émond3
1EPFL, Nanoelectronic Devices Laboratory (NanoLab), 1015 Lausanne, Switzerland.
Scientific Reports
|February 2, 2017
Summary
Researchers demonstrate a new modulated scattering technique for terahertz frequencies using a vanadium dioxide switch. This advancement enables faster, energy-efficient terahertz communication and imaging systems.
Area of Science:
- Electromagnetics
- Materials Science
- Terahertz Technology
Background:
- The modulated scattering technique utilizes reconfigurable electromagnetic scatterers to modulate impinging fields.
- Current applications span radio frequencies to millimeter waves, but terahertz implementation is challenging.
Purpose of the Study:
- To design and experimentally demonstrate the modulated scattering technique at terahertz frequencies.
- To characterize a novel modulated scatterer for terahertz applications.
Main Methods:
- A modulated scatterer comprising a bowtie antenna loaded with a vanadium dioxide (VO2) switch was designed.
- The scatterer was actuated using a continuous current.
- Terahertz time-domain spectroscopy was employed for characterization.
Main Results:
- The modulated scatterer exhibited significant signal strength above 0.5 THz.
- The device demonstrated successful modulation of terahertz fields.
- The operation of a micro-meter sized VO2 switch at terahertz frequencies was verified.
Conclusions:
- The developed modulated scattering technique is a promising candidate for terahertz applications.
- This technology can lead to the development of fast and energy-efficient terahertz communication and imaging systems.
- The study validates the use of VO2 switches in terahertz modulated scattering.
