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    • 28. 发明授权
    • Thermal-assisted magnetic recording head having dielectric waveguide, metal waveguide and near-field light generating element
    • 具有介质波导,金属波导和近场光产生元件的热辅助磁记录头
    • US08462593B1
    • 2013-06-11
    • US13367767
    • 2012-02-07
    • Eiji KomuraKoji ShimazawaTsutomu ChouShinji HaraKosuke Tanaka
    • Eiji KomuraKoji ShimazawaTsutomu ChouShinji HaraKosuke Tanaka
    • G11B11/00
    • G11B5/314G11B5/6088G11B2005/0021
    • A magnetic head includes a dielectric waveguide to propagate propagation light; a metal waveguide facing the dielectric waveguide, coupling to the propagation light propagating through the dielectric waveguide in a surface plasmon mode, generating first surface plasmon with larger wavenumber than that of the propagation light, and propagating the first surface plasmon; a near-field light generating element facing the metal waveguide and extending to ABS, coupling to the first surface plasmon propagating on the metal waveguide in a surface plasmon mode, generating second surface plasmon with wavenumber larger than that of the first surface plasmon, propagating the second surface plasmon to an end part on the ABS side, and generating near-field light at the end part on the ABS side; and a recording magnetic pole provided in the vicinity of the near-field light generating element and having an end part positioned on the ABS.
    • 磁头包括传播传播光的电介质波导; 面向电介质波导的金属波导,以表面等离子体模式耦合到通过电介质波导传播的传播光,产生波数比传播光波数大的第一表面等离子体,并传播第一表面等离子体; 面向金属波导并延伸到ABS的近场光产生元件,以表面等离子体模式耦合到在金属波导上传播的第一表面等离子体激元,产生波数大于第一表面等离子体波的第二表面等离子体,传播 第二表面等离子体激元到ABS侧的端部,并且在ABS侧的端部产生近场光; 以及设置在近场光产生元件附近并具有位于ABS上的端部的记录磁极。