Nanocavity induced light concentration for energy efficient heat assisted magnetic recording media

Chenhua Deng, Haomin Song, James Parry, Yihao Liu, Shuli He, Xiaohong Xu, Qiaoqiang Gan, Hao Zeng

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

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 SiO2 layer 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.
Original languageEnglish (US)
Pages (from-to)750-755
Number of pages6
JournalNano Energy
Volume50
DOIs
StatePublished - Aug 1 2018
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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