Gas breakdown and plasma impedance in split-ring resonators

  • Alan R. HoskinsonEmail author
  • Stephen Parsons
  • Jeffrey Hopwood
Regular Article
Part of the following topical collections:
  1. Topical Issue: Recent Breakthroughs in Microplasma Science and Technology


The appearance of resonant structures in metamaterials coupled to plasmas motivates the systematic investigation of gas breakdown and plasma impedance in split-ring resonators over a frequency range of 0.5−9 GHz. In co-planar electrode gaps of 100 μm, the breakdown voltage amplitude decreases from 280 V to 225 V over this frequency range in atmospheric argon. At the highest frequency, a microplasma can be sustained using only 2 mW of power. At 20 mW, we measure a central electron density of 2 × 1020 m-3. The plasma-electrode overlap plays a key role in the microplasma impedance and causes the sheath impedance to dominate the plasma resistance at very low power levels.

Graphical abstract


Breakdown Voltage Split Ring Resonator Plasma Resistance Sheath Thickness Plasma Impedance 
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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Alan R. Hoskinson
    • 1
    Email author
  • Stephen Parsons
    • 1
  • Jeffrey Hopwood
    • 1
  1. 1.Electrical and Computer Engineering, Tufts UniversityMedfordUSA

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