Low-loss chalcogenide waveguides for chemical sensing in the mid-infrared.
Low-loss chalcogenide waveguides for chemical sensing in the mid-infrared.
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DOI：
10.1364/oe.21.029927
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发表时间：
2013-12
期刊：
影响因子：
3.8
通讯作者：
P. Ma;D. Choi;Yi Yu;X. Gai;Zhiyong Yang;S. Debbarma;S. Madden;B. Luther-Davies
中科院分区：
文献类型：
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作者：
P. Ma;D. Choi;Yi Yu;X. Gai;Zhiyong Yang;S. Debbarma;S. Madden;B. Luther-Davies
我们报道了用于中红外（MIR）传感的低损耗硫族化物波导的特性。波导由Ge_xAs_xSe_xSe_xSi_xSi_在1500至4000 cm ²的大部分功能组频带上，损耗< 1 dB/cm，在2000 cm ²处最小为0.3 dB/cm。通过测量可溶性普鲁士蓝在二甲基亚砜中的吸收光谱，证明了这些波导的光谱学的基本能力。
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 4000 cm⁻¹ the losses were < 1 dB/cm with a minimum of 0.3 dB/cm at 2000 cm⁻¹. The basic capabilities of these waveguides for spectroscopy were demonstrated by measuring the absorption spectrum of soluble Prussian blue in Dimethyl Sulphoxide.