Journal
OPTICS EXPRESS
Volume 21, Issue 24, Pages 29927-29937Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.029927
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Funding
- China Scholarship Council [201206020094, 201206110048]
- Australian Research Council (ARC) Centre of Excellence for Ultrahigh Bandwidth Devices for Optical Systems [CE110001018]
- ARC DECRA project [DE120101036]
- ARC [FT110100853]
- Discovery project [DP130100086]
- Australian Research Council [DE120101036] Funding Source: Australian Research Council
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We report the characteristics of low-loss chalcogenide waveguides for sensing in the mid-infrared (MIR). The waveguides consisted of a Ge11.5As24Se64.5 rib waveguide core with a 10nm fluoropolymer coating on a Ge11.5As24S64.5 bottom cladding and were fabricated by thermal evaporation, photolithography and ICP plasma etching. Over most of the functional group band from 1500 to 4000cm(-1) the losses were < 1dB/cm with a minimum of 0.3dB/cm at 2000cm(-1). The basic capabilities of these waveguides for spectroscopy were demonstrated by measuring the absorption spectrum of soluble Prussian blue in Dimethyl Sulphoxide. (C) 2013 Optical Society of America
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