Chenhua Deng, Haomin Song,James Parry, Yihao Liu, Shuli He, Xiaohong Xu, Qiaoqiang Gan, Hao Zeng. Nanocavity induced light concentration for energy efficient heat assisted magnetic recording media.(Nano Energy, 2018, 50, 750-755)
许小红教授课题组在Nano Energy杂志上发表研究论文。
Abstract
Enhancing light absorption in the recording media layer can improve the energy efficiency and prolong the device lifetime in heat assisted magnetic recording(HAMR). In this work, we report the design and implementation of a resonant nanocavity structure to enhance the light-matter interaction within an ultrathin FePt layer. In a Ag/SiO2/FePt trilayer structure, the thickness of the dielectric SiO2layer is systematically tuned to reach maximum light absorption at the wavelength of 830 nm. In the optimized structure, the light reflection is reduced by more than 50%. This results in effective laser heating of the FePt layer, as imaged by an infrared camera. The scheme is highly scalable for thinner FePt layers and shorter wavelengths to be used in future HAMR technologies.
全文链接：https://www.sciencedirect.com/science/article/pii/S2211285518304312
