Invention Grant
US08134894B2 Surface plasmon polariton direction change device, read/write head, laser-assisted magnetic recording apparatus, and optical circuit
失效
表面等离子体极化子方向改变装置，读/写头，激光辅助磁记录装置和光电路
- Patent Title: Surface plasmon polariton direction change device, read/write head, laser-assisted magnetic recording apparatus, and optical circuit
- Patent Title (中): 表面等离子体极化子方向改变装置，读/写头，激光辅助磁记录装置和光电路
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Application No.: US12445718Application Date: 2007-10-03
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Publication No.: US08134894B2Publication Date: 2012-03-13
- Inventor: Tazuko Kitazawa , Tomoki Ono
- Applicant: Tazuko Kitazawa , Tomoki Ono
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2006-281977 20061016
- International Application: PCT/JP2007/069370 WO 20071003
- International Announcement: WO2008/047601 WO 20080424
- Main IPC: G11B11/00
- IPC: G11B11/00 ; G02B6/10
Abstract:
This invention provides a surface plasmon polariton direction change device (1) for changing a propagation direction of a surface plasmon polariton (5). The surface plasmon polariton direction change device (1) includes a metal film support member (2), and a first metal film (3) and a second metal film (4) which are provided on a predetermined surface of the metal film support member (2), are provided adjacently to each other, and are different from each other in effective refractive index. The surface plasmon polariton direction change device (1) is characterized in that the first metal film (3) and the second metal film (4) are provided so that, in at least a part of a boundary between the first metal film (3) and the second metal film (4), an angle θ formed between (i) a line perpendicular to the boundary and (ii) the propagation direction of the surface plasmon polariton (5) satisfies 0°
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