Open AccessHigh field enhancement between transducer and resonant antenna for application in bit patterned heat-assisted magnetic recording
Author(s) -
Jacek Gosciniak,
Mahmoud Rasras
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.008605
Subject(s) - heat assisted magnetic recording , materials science , optics , antenna (radio) , plasmon , transducer , optoelectronics , magnetic field , patterned media , acoustics , computer science , physics , telecommunications , grain size , quantum mechanics , metallurgy
Heat-Assisted Magnetic Recording (HAMR) is a well-known technology that uses the concept of a plasmonic antenna to shrink the optical focused spot to sizes of tens of nanometers, in order to overcome the limits of conventional magnetic recording and to reach areal density >1 Tb/in 2 . In this paper, we propose a novel concept that allows to increase a power transfer to the recording media deposited on the patterned substrate that takes a full advantage of the resonant antenna conditions to achieve further intensity enhancement in the gap and consequently high-power transfer to the recording media. Apart from the high field enhancement, the proposed concept ensures uniform field distribution in the gap that translates into uniform and higher temperature in the recording media, which is highly desired in the HAMR technology.