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Surface plasmon modes guided by Ga-doped ZnO layers bounded by different dielectrics
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10.1063/1.3608313
/content/aip/journal/apl/99/1/10.1063/1.3608313
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/1/10.1063/1.3608313
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color) Angle- and frequency-dependent SPR reflectivity (R p/R s) of ZnO:Ga layers with different thicknesses: (a) 218 nm, (b) 107 nm, and (c) 41 nm. Incident angle (θ) varies from 45° (black line) to 75° (pink line) in 5° increments. Inset of Fig. 1(c) is a schematic of the air-ZnO-glass substrate layers and Cartesian coordinates.

Image of FIG. 2.
FIG. 2.

(Color) Dispersion curve (ω-k x curve: black circles) of ZnO:Ga layers of different thicknesses: (a) 218 nm, (b) 107 nm, and (c) 41 nm. Red and blue lines represent symmetric (s-) and asymmetric (a-) modes, respectively, as calculated using Eq. (1). ω sp-(s) and ω sp-( a ) are resonant frequencies of s- and a-modes SPs, respectively; c and c/n glass represent light lines of air and glass, respectively; n glass is the refractive index of glass.

Image of FIG. 3.
FIG. 3.

(Color) Theoretical dispersion relations (ω-k x curves) of ZnO:Ga layers of different thicknesses. (a) symmetric (s-) and (b) asymmetric (a-) modes, as calculated using Eq. (1). (c) Dependence of wave vector (k x) of s- and a-modes on a ZnO:Ga layer thickness. k x values are taken at a frequency of 6254 cm−1. Inset depicts s- and a-modes in an asymmetric trilayer air-ZnO:Ga-glass structure.

Image of FIG. 4.
FIG. 4.

(Color) Distributions of electric (E z) and magnetic (H y) fields in ZnO:Ga layers with different thicknesses: (a, d) 218 nm, (b, e) 107 nm, and (c, f) 41 nm. Calculations for E z and H z fields were at frequencies (ω) of 5992, 6605, and 7502 cm−1 for 218, 107, and 41 nm, respectively. E z field distributions were simulated by the finite-difference time-domain method.

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/content/aip/journal/apl/99/1/10.1063/1.3608313
2011-07-08
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface plasmon modes guided by Ga-doped ZnO layers bounded by different dielectrics
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/1/10.1063/1.3608313
10.1063/1.3608313
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