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Ultracompact silicon-on-insulator ridge-waveguide mirrors with high reflectance
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10.1063/1.2372581
/content/aip/journal/apl/89/17/10.1063/1.2372581
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/17/10.1063/1.2372581
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

SEM photographs of two microcavities considered in this work. The Bragg mirrors are composed of a four-hole taper and of a periodic section with holes ( and 4 in the photographs). The taper hole diameters, measured with the SEM, are 130, 160, 185, and with center-to-center hole distances of 300, 315, 325, and . The periodic section of the mirrors is composed of holes with a diameter and the periodicity constant is . The side-to-side distance between the two inner holes (the physical length of the cavities) is .

Image of FIG. 2.
FIG. 2.

Experimental results and data analysis. (a) Recorded transmission spectrum (in arbitrary units) of the microcavity with holes in the periodic section of the mirror. The high-frequency oscillations are Fabry-Perot fringes due to the bouncing of light between the cleaved facets. The solid bold curve is obtained after filtering. (b) Fourier transform of the cavity transmissions for the cavity (solid curve) and for the cavity (dashed curve). (c) Comparison between the measured and calculated factors as a function of . Squares: experimental data. Dots: values obtained with the Fabry-Perot model from modal reflectivities calculated for geometric dimensions measured on the actual device.

Image of FIG. 3.
FIG. 3.

Beneficial impact of the tapering process on the mirror performance. The bold (thin) solid curves correspond to calculated radiation losses (defined as ) for tapered (periodic) semi-infinite mirrors . The loss spectra are calculated from dimensions measured on the actual devices, as given in the caption of Fig. 1. The thin-dashed curves are obtained for mirrors with variation of all hole diameters, and the vertical dashed lines indicate the band edges of the periodic mirror.

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/content/aip/journal/apl/89/17/10.1063/1.2372581
2006-10-27
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultracompact silicon-on-insulator ridge-waveguide mirrors with high reflectance
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/17/10.1063/1.2372581
10.1063/1.2372581
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