Device with waveguide defined by dielectric in aperture of...

Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam

Reexamination Certificate

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Reexamination Certificate

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06999384

ABSTRACT:
A device for writing data to a recording medium and a method for fabricating the device is presented. According to one embodiment, the device includes an electrical conductor having a cross-track portion, wherein the cross-track portion includes first and second opposing surfaces, and wherein the cross-track portion defines an aperture extending from the first surface to the second surface. The device also includes a dielectric portion disposed in the aperture such that the dielectric portion defines a ridge waveguide having a lowest-order mode cut-off frequency that is less than the frequency of incident optical energy used to heat the recording medium.

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Shi, Xiolei et al, “A Nano-aperture with 1000x Power Throughput Enhancement for Very Small Aperture Laser System (VSAL)”, 2002, Proc. SPIE v. 4342 p. 320-327.
Sun, Weimin and Balanis, Constantine A., “MFIE Analysis and Design of Ridged Waveguides”, Nov. 1993, v. 41, n. 11, p. 1965.
Bain, “Magnetic Recording Devices: Inductive Heads, Properties,”Encyclopedia of Materials: Science and Technology, Elsevier Science Ltd., 2001, pp. 4868-4879.
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