Mid-Infrared Characteristics of Metal/Insulator/Metal Tri-layer Structures Using Rectangular Metallic Patch Array as Top Layer and Polarized Multi-Spectral IR Thermal Emitters
Date Issued
2010
Date
2010
Author(s)
Chang, Pei-En
Abstract
The characteristics of surface plasmon polaritons (SPPs) in metal/insulator/metal (MIM) structures using square patch arrays as top layers in the mid infrared region have been studied theoretically and experimentally. By tuning the size of square metallic patches, the shifts of peak positions and mode spacing variations of localized surface plasmon polaritons (LSPPs) have been investigated. The angular pattern of the LSPP modes has provided an excellent method to design wide-angle illumination or light-sensing devices. Besides, the effect on dispersion relation of material dispersion and changing of distances between metallic patches has been investigated. The effect gives a guideline to optimize the performance of the structure. Another structure using rectangular patch arrays as top layers of MIM structures has been discovered to possess multi-spectral and polarization response in thermal radiation. Integrate the structure with a rotatable polarizer, the system can serve as a peak-switchable IR thermal emitter.
Subjects
plasmonics
infrared
thermal emitter
optical antenna
Type
thesis
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