Open AccessEnhanced mid-infrared transmission in heavily doped n-type semiconductor film based on surface plasmons
Author(s) -
Lei Hua,
Guofeng Song,
Baoping Guo,
Weimin Wang,
Zhang Yu
Publication year - 2008
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.57.7210
Subject(s) - materials science , dopant , surface plasmon , doping , plasmon , semiconductor , surface plasmon polariton , transmission (telecommunications) , polariton , infrared , optoelectronics , optics , coupling (piping) , physics , telecommunications , computer science , metallurgy
Transmission of electromagnetic wave in a heavily doped n-type GaAs film is studied theoretically. From the calculations, an extraordinary transmission of p-polarized waves through the film with subwavelength grooves on both surfaces at mid-infrared frequencies is found. This extraordinary transmission is attributed to the coupling of the surface-plasmon polariton modes and waveguide modes. By selecting a set of groove parameters, the transmission is optimized to a maximum. Furthermore, the transmission can be tuned by dopant concentrations. As the dopant concentration increases, the peak position shifts to higher frequency but the peak value decreases.