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Rainbow trapping and releasing by chirped plasmonic waveguides at visible frequencies
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10.1063/1.3502487
/content/aip/journal/apl/97/15/10.1063/1.3502487
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/15/10.1063/1.3502487
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic of CPW for trapping a rainbow in the visible domain. (b) Calculated band dispersion for different units of dielectric gratings.

Image of FIG. 2.
FIG. 2.

Simulated intensity distributions of SPPs through the CPW shown in Fig. 1(a) as the incident light is at 400 nm, 460 nm, 520 nm, 580 nm, 640 nm, and 700 nm, respectively. In the simulations, the spatial and temporal steps are , and , is the light velocity in vacuum.

Image of FIG. 3.
FIG. 3.

(a) Calculated intensity distribution of SPPs in time-position plane (along the axis, 5 nm above the metal surface). Where the incident light is a TM-polarized Gaussian pulse with pulse width and central wavelength (magnetic field is parallel to the axis). All the geometrical parameters are the same as that of Fig. 1(a). (b) Dependence of SPP intensity on time. (c) Trapping time as a function of CPW length.

Image of FIG. 4.
FIG. 4.

(a) Schematic of the structure for releasing the trapped rainbow. A periodic dielectric grating with 60 nm and 90 nm wide dielectric and air layers, respectively, is attached on the bottom of the metal film. The grating depth is 200 nm and the thickness of silver film is 40 nm. Insets [(1)–(4)]: Schematics of the upper band profiles of (1) the attached dielectric gratings with different refractive index and [(2)–(4)] different grating units of CPW along the light propagation direction. The upper band edge wavelengths of two grating units (, , and , ) are and , respectively. [(b)–(i)] Intensity distributions of SPPs excited by [(b)–(e)] and [(f)–(i)] for different time steps: [(b) and (f)] 50 fs, [(c) and (g)] 66.7 fs, [(d) and (h)] 116.7 fs, and [(e) and (i)] 266.7 fs.

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/content/aip/journal/apl/97/15/10.1063/1.3502487
2010-10-13
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Rainbow trapping and releasing by chirped plasmonic waveguides at visible frequencies
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/15/10.1063/1.3502487
10.1063/1.3502487
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