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Optical tuning of three-dimensional photonic crystals fabricated by femtosecond direct writing
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10.1063/1.2037862
/content/aip/journal/apl/87/9/10.1063/1.2037862
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/9/10.1063/1.2037862
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of a void channel woodpile photonic crystal structure (a). (b)–(e) Two-photon fluorescence images of the first four layers of the photonic crystal. The concentration of liquid crystals is 6%.

Image of FIG. 2.
FIG. 2.

Schematic diagram of liquid-crystal alignment within the droplets. With no field applied (a) the liquid-crystal directors are randomly aligned. After the polling by a polarized beam, they are optically aligned into the direction parallel to the cell surface (b).

Image of FIG. 3.
FIG. 3.

Variations in the stop gap position with the application of a polarized optical field for 0%, 10%, and 24% liquid-crystal concentrations. The reference cell (0%) shows no stop gap movement as a result of the optical polling. The shading effect in (a)–(c) represents an increase in the refractive index of the bulk material with the application of optical polling to the cell.

Image of FIG. 4.
FIG. 4.

The band-gap shift as a function of the optical polling (a) and electrical polling (b) processes for the 24% sample. The stop gap position shifts to shorter or longer wavelengths with the application of an optical field or an electrical field, respectively. The transmission spectra corresponding to (a) and (b) are given in (c) and (d).

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/content/aip/journal/apl/87/9/10.1063/1.2037862
2005-08-25
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical tuning of three-dimensional photonic crystals fabricated by femtosecond direct writing
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/9/10.1063/1.2037862
10.1063/1.2037862
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