R&D: Achieving High-Density 2D Optical Storage Through Angle Resolved Localized Surface Plasmon Resonance (LSPR) Arrays – Case Study of Square Array

Optics Communications has published an article written by Zhidan Lei, Dekun Yang, Yiduo Xu, The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China, Hubao A, State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430072, China, Yi Song, Cheng Lei, and Yan Zhao, The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.

Abstract: “With the development of optical storage technology, there is an increasing amount of research based on multi-dimensional high-density storage. Compared to two-dimensional storage, three-dimensional storage can achieve ultra-high-density optical storage by stacking two-dimensional storage layer by layer on the vertical direction. However, three-dimensional storage has problems such as high manufacturing costs, large processing errors and complex readout processes. Therefore, it is of great interest to study the implementation of two-dimensional ultra-high-density optical storage. Plasmonic is one of the most promising technologies to realize ultra-high-density, low maintenance media, and long-life optical storage. In this work, nano-scaled rotary gold square two-dimensional arrays were designed to achieved ultra-high-density optical storage. For angle-resolved localized surface plasmon resonance (LSPR) nano-arrays, when the rotation angle of 1-unit gold square nano-structure is 2°, the storage density was 12.79 GB/cm², which was 53.29 times of a single-layer Blu-ray disk. By varying the shape and size of the nano-structure, higher two-dimensional storage densities could be achieved. Research results showed that, with proper design, the density of two-dimensional optical storage can match or exceed that of three-dimensional optical storage. This study demonstrates the potential of LSPR-based two-dimensional nanostructures for optical storage, providing another possibility for ultra-high density and high-resolution optical storage.“