TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=85048569294&partnerID=8YFLogxK
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 -