Title:
APPARATUS AND METHOD FOR PRODUCING A SMALL SPOT OF OPTICAL ENERGY
Document Type and Number:
WIPO Patent Application WO2004003932
Kind Code:
A3
Abstract:
An apparatus for producing a small spot of optical energy comprises a planar waveguide shaped to direct a linearly polarized electromagnetic wave to a focal point within the waveguide, and a metallic pin positioned at the focal point whereby the linearly polarized electromagnetic wave creates surface plasmons on a surface of the pin. The apparatus can further comprise means for phase shifting a portion of the linearly polarized electromagnetic wave. Recording heads comprising a magnetic write pole, a planar waveguide positioned adjacent to the magnetic write pole, the planar waveguide being shaped to direct a linearly polarized electromagnetic wave to a focal point within the waveguide, and a metallic pin positioned at the focal point whereby the linearly polarized electromagnetic wave creates surface plasmons on a surface of the pin, and disc drives that use such recording heads are also disclosed.
Inventors:
CHALLENER WILLIAM A
MIHALCEA CHRISTOPHE D
RAUSCH TIM
MIHALCEA CHRISTOPHE D
RAUSCH TIM
Application Number:
PCT/US2003/008421
Publication Date:
February 03, 2005
Filing Date:
March 19, 2003
Export Citation:
Assignee:
SEAGATE TECHNOLOGY LLC (US)
International Classes:
G11B5/012; G11B5/127; G11B5/00; (IPC1-7): G12B21/06; G11B5/012; G11B5/127
Foreign References:
| US20010009541A1 | 2001-07-26 | |||
| EP1148370A2 | 2001-10-24 | |||
| US6055220A | 2000-04-25 | |||
| US5559330A | 1996-09-24 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 26 1 July 2002 (2002-07-01)
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