Dynamic control of plasma photonic crystals in the mm-wave region
Wu, Zhenglun
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https://hdl.handle.net/2142/130223
Description
Title
Dynamic control of plasma photonic crystals in the mm-wave region
Author(s)
Wu, Zhenglun
Issue Date
2025-07-24
Director of Research (if dissertation) or Advisor (if thesis)
Eden, James Gary
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Plasma
Photonic Crystals
Abstract
Photonic crystals (PCs) manipulate electromagnetic waves by comprising a periodic modulation of refractive index. However, once fabricated from solid dielectrics, their electromagnetic properties remain fixed. Plasma photonic crystals (PPCs) address this limitation by incorporating tunable plasma layers whose permittivity varies with electron density, allowing dynamic reconfiguration. With advanced microfabrication, microplasma columns can now be embedded directly within the crystal, reducing the period to sub-millimeter dimensions and pushing the operating band into the hundreds-of-GHz range. Consequently, such PPCs hold great promise as adaptable millimeter-wave components for future communication and spectroscopy systems. This thesis introduces the underlying theory of conventional PCs and microplasma, then experimentally investigates transmission measurements and optical emission spectroscopy.
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