The Extraordinary Transmission through a Metal Film Perforated with Periodic Hole Arrays and the Characteristics of Infrared Thermal Emitter
Date Issued
2008
Date
2008
Author(s)
Ye, Yi-Han
Abstract
The band diagram of surface plasmons (SPs) on a periodic array of metal holes is investigated in theory and experiment. The extraordinary transmission through a silver film perforated with rectangular hole arrays in a square lattice with different aspect ratios is measured in order to investigate the influence of localized charge oscillations around the hole. Besides, the localized surface plasmon polariton (LSPP) modes were observed by measuring the dispersion relation in infrared plasmonic thermal emitters with top Ag grating. Different from the behavior of SP modes, the LSPP modes are determined by the top Ag line width and are independent of the period of the grating. By varying the thickness of the intermediate SiO2, the coupling of SPs between the top and bottom Ag/SiO2 interface was investigated. This coupling effect results in the red shift of emission peak of thermal emitter. Furthermore, the transition from LSPP modes to SP modes was observed as the thickness of SiO2 layer increased.
Subjects
surface plasmon
thermal emitter
coupling effect
Type
thesis
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