Abstract
The inscription of Bragg gratings in chalcogenide () wires with subwavelength diameter is proposed and demonstrated. A modified transverse holographic method employing He–Ne laser light at a wavelength of allows the writing of Bragg grating reflectors in the band. The gratings reach an extinction ratio of in transmission and a negative photo-induced index change of . The inscription of Bragg gratings in chalcogenide microwires will enable the fabrication of new devices with applications in nonlinear optics and sensing in the near- to mid-IR region of wavelengths.
© 2011 Optical Society of America
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