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Space-variant polarization manipulation of a thermal emission by a subwavelength grating supporting surface phonon-polaritons
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10.1063/1.1922084
/content/aip/journal/apl/86/19/10.1063/1.1922084
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/19/10.1063/1.1922084
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Figures

Image of FIG. 1.
FIG. 1.

(a) The calculated spectral reflectance in the normal direction for a flat surface (crosses), and for a grating with period , fill factor , and depth for TM polarization (triangles) and TE polarization (circles). The inset illustrates the illumination scheme of the grating. (b) The spectral dependence of the real part of the dielectric constant, . (c) The calculated emissivity vs grating depth for TM and TE polarizations for a wavelength of in the normal direction of light, with grating parameters: period and fill factor . (d) The calculated emissivity vs grating fill factor for TM and TE polarizations for a wavelength of in the normal direction of light, with grating parameters of: period , .

Image of FIG. 2.
FIG. 2.

Measured and calculated spectral reflectance with an incidence angle of of a (a) flat surface and (b) uniform grating. Grating parameters: , fill factor , and depth . Experimental results for TE and TM (solid lines), calculated results for TE (dashed line with circles), and for TM polarization (dashed line with triangles). The inset shows SEM image of the grating.

Image of FIG. 3.
FIG. 3.

Measured (solid) and calculated (dashed) relative emissivity spectrum of the grating for TM, TE, and total (without a polarizer) emission in (a) normal observation direction and (b) . Inset shows the measured and calculated (solid lines) relative emissivity as a function of observation angle for TM (triangle) and TE (circle) polarization.

Image of FIG. 4.
FIG. 4.

(a) SEM image of the spiral subwavelength elements with polarization order numbers , 2, 3, and 4. Thermal emission images emerging from the spiral elements (b) captured through a polarizer and (c) without a polarizer, for . The elements were uniformly heated to a temperature of . The lines indicate the local TM polarization orientation measured in the near-field.

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/content/aip/journal/apl/86/19/10.1063/1.1922084
2005-05-02
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Space-variant polarization manipulation of a thermal emission by a SiO2 subwavelength grating supporting surface phonon-polaritons
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/19/10.1063/1.1922084
10.1063/1.1922084
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