R&D: Simulation on Near-Field Light on Recording Medium Generated by Semiconductor Ring Resonator With Metal Nano-Antenna for HAMR
Near-field light generated by device was analyzed through numerical simulation based on 3D model including recording medium to optimize structure of device.
This is a Press Release edited by StorageNewsletter.com on October 28, 2020 at 2:01 pmOptical Review has published an article written by Ryuichi Katayama, Department of Information Electronics, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1, Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan, and Satoshi Sugiura, InnovaStella, Inc., 465 Ohsato-cho, Kofu, Yamanashi, 400-0053, Japan.
Abstract: “Heat-assisted magnetic recording (HAMR) is a promising technology for achieving more than 10Tbit/inch2 recording density. A near-field transducer (NFT), which forms a small light spot on a recording medium, is necessary in HAMR. However, the heat generated by the NFT would melt the NFT itself. To solve this problem, the authors have proposed a novel device, in which a metal nano-antenna is attached to a semiconductor ring resonator. In this paper, the near-field light generated by this device was analyzed through a numerical simulation based on a 3-dimensional model including the recording medium to optimize the structure of the device. It was found that how to excite a desired eigenmode selectively among some eigenmodes is important to make the device effective. A light spot with a diameter of about 25nm, which corresponds to the recording density of 1Tb/inch2, was obtained on the surface of the recording medium. It was also found that the design parameters of the device must be optimized considering the recording medium“
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