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(a) SEM micrograph of a silicon fiber with the core slightly etched from the cladding; scale bar . (b) Polished fiber for optical coupling, mounted inside a thicker capillary; scale bar .
(a) Raman spectra for the amorphous silicon fibers; sample A (solid curve) and sample B (dashed curve). Inset indicates the presence of hydrogen in sample A. (b) Raman spectra of the polysilicon fibers (top 3 curves) and a single crystal silicon wafer (bottom curve). Dashed lines are Voigt fits.
Transmission losses as a function of wavelength for amorphous sample (A) and polysilicon samples (C) , (D) , and (E) . Dashed lines are fits.
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