Plasma modification of spoof plasmon propagation along metamaterial-air interfaces
Abstract
We report on measurements of the shift in resonance frequency of “spoof” surface plasmon polariton propagation along a 2-D metamaterial slow-wave structure induced by a gaseous plasma near the metamaterial/air interface. A transmission line circuit model for the metamaterial structure interprets the introduction of a plasma as a decrease in unit cell capacitance, causing a shift in the plasmon dispersion to higher frequency. We show through simulations and experiments that the effects of this shift at the resonance frequency and attenuation below and above resonance depend on the plasma density. The shifts recorded experimentally are small owing to the low plasma densities generated near the structure, ∼1011 cm−3, but simulations show that a shift of ∼3% of the resonance frequency can be generated at plasma densities of ∼1012 cm−3.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 25, 2017
- Source ID
- 10.1063/1.5006666
Entities
People
- Benjamin Wang
- M. A. Cappelli
- R. Lee
Organizations
- Air Force Office of Scientific Research
- Stanford University