Optical recording head including an optical resonant cavity

Details Optical recording head including an optical resonant cavity Optical recording head including an optical resonant cavity

2008-04-29

2008-04-29

Chen, Tianjie (Department: 2627)

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Reexamination Certificate

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07365941

ABSTRACT:
An optical recording head including a media heating device to write and read data to a heat sensitive optical media disk. The media heating device includes an optical energy resonant cavity that produces a high intensity near-field optical spot of subwavelength dimension. Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate the cavity, and optical energy is coupled out of the cavity through an aperture that is placed proximate an antinode or post within the cavity. In reading data from the optical media, a photodetector is placed at the end of the waveguide. Optical energy emitted from the end of the waveguide is influenced by the reflectivity of the media data bit, and is interpreted as the data bit signal.

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