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Enlargement of omnidirectional photonic bandgap in porous silicon dielectric mirrors with a Gaussian profile refractive index
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10.1063/1.3081113
/content/aip/journal/apl/94/6/10.1063/1.3081113
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/6/10.1063/1.3081113
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Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic draw of the refractive index profile of a typical unit cell corresponding to the different photonic structures studied in this work. Part A of width consisted of 21 layers of widths (where is the growth direction of structure) with refractive indices adjusted to the envelope of a Gaussian function. The refractive indices in the part A varies from to . Part B has a width and a constant refractive index . (b) balanced mirror structure composed of six different Gaussian structures having eight periods each. The central wavelength , corresponding to each designed Gaussian structure is shown in the schematic (c) unbalanced structure with the similar six Gaussian structures having 13, 6, 5, 5, 6, and 13 periods, respectively.

Image of FIG. 2.
FIG. 2.

Measured (solid line) and simulated (dashed line) reflectance spectra of the structure for 8° and 68° angle of incidence. Inset shows the simulated reflectance spectra for incident angles at 0° and 89.9°. The marked gray region represents the OPBG range.

Image of FIG. 3.
FIG. 3.

Measured reflectance spectra of the structure at 8° and 68° angle of incidence. Inset shows the simulated reflectance spectra for incident angles at 0° and 89.9°. The marked gray region represents the OPBG range.

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/content/aip/journal/apl/94/6/10.1063/1.3081113
2009-02-12
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enlargement of omnidirectional photonic bandgap in porous silicon dielectric mirrors with a Gaussian profile refractive index
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/6/10.1063/1.3081113
10.1063/1.3081113
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