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

doi:10.1016/j.nanoen.2018.06.036

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 journal › Article › peer-review

12 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 language	English (US)
Pages (from-to)	750-755
Number of pages	6
Journal	Nano Energy
Volume	50
DOIs	https://doi.org/10.1016/j.nanoen.2018.06.036
State	Published - Aug 1 2018
Externally published	Yes

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2018.06.036

Cite this

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title = "Nanocavity induced light concentration for energy efficient heat assisted magnetic recording media",

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.",

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

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T1 - Nanocavity induced light concentration for energy efficient heat assisted magnetic recording media

AU - Deng, Chenhua

AU - Song, Haomin

AU - Parry, James

AU - Liu, Yihao

AU - He, Shuli

AU - Xu, Xiaohong

AU - Gan, Qiaoqiang

AU - Zeng, Hao

N1 - Generated from Scopus record by KAUST IRTS on 2022-09-13

PY - 2018/8/1

Y1 - 2018/8/1

N2 - 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.

AB - 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.

UR - https://linkinghub.elsevier.com/retrieve/pii/S2211285518304312

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U2 - 10.1016/j.nanoen.2018.06.036

DO - 10.1016/j.nanoen.2018.06.036

M3 - Article

SN - 2211-2855

VL - 50

SP - 750

EP - 755

JO - Nano Energy

JF - Nano Energy

ER -

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

Abstract

ASJC Scopus subject areas

UN SDGs

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