Open AccessTerahertz surface plasmon polariton couping on brass rods
Author(s) -
Hua Chen,
Wang Li
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.4605
Subject(s) - terahertz radiation , materials science , rod , surface plasmon polariton , brass , optics , plasmon , surface plasmon , grating , polariton , surface plasmon resonance , polarization (electrochemistry) , electric field , resonance (particle physics) , perpendicular , optoelectronics , physics , atomic physics , nanotechnology , medicine , chemistry , alternative medicine , geometry , pathology , quantum mechanics , copper , mathematics , nanoparticle , metallurgy
In the experiment for studying the nature of coupling between suface plasmon SP wave and terahertz radiation by subwavelenth-sized brass rods, we found that the polarization of the THz field, size of rods, and slit between rods critically affect the coupling efficiency. By the method of Fourier transform of the time domain data, we found the coupling frequency in THz range. With equal slits between the brass rods, we demonstrated thar the transmission resonance is attributed to the combined effects of surface plasmon and cavity mode resonance when the electric vector is perpendicular to the grating wires, while the cavity mode resonance dominates the resonance transmission when they are parallel.