Shang Zhenzhen, Zhang Guoting, Liu Xiaoying, Huang Haishen
School of Science, Qiongtai Normal University, Haikou 571127, China.
Faculty of Teacher Education, Hainan Normal University, Haikou 571158, China.
Materials (Basel). 2025 Aug 29;18(17):4046. doi: 10.3390/ma18174046.
Tunability of the localized surface plasmon resonance (LSPR) peak position of gold and silver nanoparticle arrays embedded in a liquid crystal cell is investigated in this paper. The extinction spectra are computed using the Finite-Difference Time Domain (FDTD) simulation algorithms. Results show that the LSPR properties exhibit significant dependence on nanoparticle size and shape, array periodicity, and liquid crystal layer thickness. Notably, the LSPR wavelength saturates when the liquid crystal thickness exceeds a critical value. Furthermore, controlled rotation of the liquid crystal optical axis within distinct planes (xoy and xoz) reveals systematic variations in LSPR characteristics. Finally, we identify the key factors governing the LSPR spectral sensitivity of these noble metal nano-arrays.
本文研究了嵌入液晶盒中的金和银纳米颗粒阵列的局域表面等离子体共振（LSPR）峰位置的可调谐性。使用时域有限差分（FDTD）模拟算法计算消光光谱。结果表明，LSPR特性对纳米颗粒的尺寸和形状、阵列周期性以及液晶层厚度有显著依赖性。值得注意的是，当液晶厚度超过临界值时，LSPR波长会饱和。此外，在不同平面（xoy和xoz）内对液晶光轴进行可控旋转，揭示了LSPR特性的系统变化。最后，我们确定了控制这些贵金属纳米阵列LSPR光谱灵敏度的关键因素。
