Korec Joanna, Stasiewicz Karol A, Jaroszewicz Leszek R
Institute of Applied Physics, Military University of Technology, 2 Kaliskiego St., 00-908 Warsaw, Poland.
Sensors (Basel). 2022 Sep 22;22(19):7192. doi: 10.3390/s22197192.
This paper presents a study of the influence of bimetallic layer covers of a tapered optical fiber surrounded by a low refractive index liquid crystal on the properties of light propagation in the taper structure. This research follows previous works on the effect of monometallic thin films (Au and Ag). In this case, the total thicknesses of the bimetallic layers were = 10 nm, and the participation of gold and silver was equal. The films were deposited on one side of the tapered waist area. The liquid crystal cells were controlled with a voltage U from 0 to 200 V, with and without amplitude modulation at a frequency of = 5 Hz. For the purposes of this research, spectral characteristics were obtained for a wavelength λ ranging from 550 to 1200 nm. Measurements were carried out at room temperature for three types of rubbed layers orientation-orthogonal, parallel, and twist in relation to the fiber axis. Obtained resonant peaks were compared with the previous results regarding the resonant wavelength, peak width, SNR, and maximum absorption. In the presented paper, the novelty is mainly focused on the materials used and their time stability, as well as corresponding changes in the technological parameters used.
本文研究了被低折射率液晶包围的锥形光纤的双金属层覆盖对锥形结构中光传播特性的影响。本研究是继之前关于单金属薄膜（金和银）效应的工作之后进行的。在这种情况下，双金属层的总厚度为 = 10 nm，金和银的占比相等。这些薄膜沉积在锥形腰部区域的一侧。液晶盒通过0至200 V的电压U进行控制，有或没有频率为 = 5 Hz的幅度调制。为了本研究的目的，获得了波长λ在550至1200 nm范围内的光谱特性。在室温下针对三种与光纤轴相关的摩擦层取向（正交、平行和扭曲）进行了测量。将获得的共振峰与先前关于共振波长、峰宽、信噪比和最大吸收的结果进行了比较。在本文中，新颖之处主要集中在所用材料及其时间稳定性，以及所用技术参数的相应变化。
