Markos Christos, Yannopoulos Spyros N, Vlachos Kyriakos
Computer Engineering and Informatics Dept. & Computer Technology Institute and Press, University of Patras, Rio GR26500, Rio-Patras, Greece.
Opt Express. 2012 Jul 2;20(14):14814-24. doi: 10.1364/OE.20.014814.
We report a novel approach for deposition of amorphous chalcogenide glass films inside the cylindrical air channels of photonic crystal fiber (PCF). In particular, we demonstrate the formation of nanocolloidal solution-based As(2)S(3) films inside the air channels of PCFs of different glass-solvent concentrations for two fibers with cladding-hole diameter 3.5 and 1.3 μm. Scanning electron microscopy is used to observe the formed chalcogenide layers and Raman scattering is employed to verify the existence and the structural features of the amorphous As(2)S(3) layers. Optical transmission measurements reveal strong photonic bandgaps over a range covering visible and near-infrared wavelengths. The transmittance spectra and the corresponding losses were recorded in the wavelength range 500-1750 nm. The main advantage of the proposed technique is the simplicity of the deposition of amorphous chalcogenide layers inside the holes of PCF and constitutes an efficient route to the development of fiber-based devices combined with sophisticated glasses for supercontinuum generation as well as other non-linear applications.
我们报道了一种在光子晶体光纤（PCF）的圆柱形空气通道内沉积非晶硫属化物玻璃薄膜的新方法。具体而言，我们展示了在两种包层孔直径分别为3.5μm和1.3μm、玻璃 - 溶剂浓度不同的PCF空气通道内，基于纳米胶体溶液形成As₂S₃薄膜。使用扫描电子显微镜观察形成的硫属化物层，并采用拉曼散射来验证非晶As₂S₃层的存在及其结构特征。光学传输测量显示在覆盖可见光和近红外波长的范围内有很强的光子带隙。在500 - 1750nm波长范围内记录了透射光谱和相应的损耗。所提出技术的主要优点是在PCF孔内沉积非晶硫属化物层的方法简单，并且是开发结合用于超连续谱产生及其他非线性应用的复杂玻璃的基于光纤的器件的有效途径。
