Low loss chalcogenide glass waveguides by thermal nano-imprint lithography
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We report the fabrication of low loss rib waveguides from chalcogenide glass films by thermal nano-imprint using a soft stamp. Waveguides 2 - 4 μm wide and 1 μm high were fabricated with extremely smooth sidewalls and optical losses limited by Rayleigh scattering to values of 0.26 dB/cm for the TM and 0.27 dB/cm for TE polarizations at 1550nm.
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Optics Express