1. A magnetic recording disk drive slider having a disk-facing surface and comprising:
an optical waveguide having a generally rectangularly-shaped output end at the disk-facing surface, the waveguide output end having a thickness in a first direction and a width in a second direction orthogonal to the first direction and greater than the thickness in said first direction;
a write head having a write pole tip at the disk-facing surface with a trailing edge spaced from the waveguide output end in the first direction, the pole tip having a width in the second direction less than the width of the waveguide; and
a read head having a sensing edge at the disk-facing surface and spaced from the waveguide output end in the first direction on the side of the waveguide opposite the write pole tip.
2. The disk drive slider of claim 1 wherein the waveguide aspect ratio of the width to thickness is greater than or equal to 4 and less than or equal to 12.
3. The disk drive slider of claim 1 wherein the ratio of the width of the waveguide output end to the distance from the center of the waveguide output end to the trailing edge of the write pole tip is greater than or equal to 2 and less than or equal to 12.
4. The disk drive slider of claim 1 wherein the optical waveguide is a rectangular waveguide having a core with a first index-of-refraction, a cladding layer with a second index-of-refraction less than said first index-of-refraction on the side of the core facing the pole tip, and a cladding layer with an index-of-refraction between said first and second indices of refraction on the side of the core opposite the side facing the pole tip.
5. The disk drive slider of claim 4 wherein the core is formed essentially of Ta2O5, the cladding layer on the side of the core facing the pole tip is formed essentially of one of SiO2 and Al2O3, and the cladding layer on the side of the core opposite the side facing the pole tip is formed of a composite selected from SiO2\u2014Ta2O5 and Al2O3\u2014Ta2O5.
6. A thermally-assisted shingled-writing magnetic recording disk drive comprising:
a rotatable magnetic recording disk comprising a substrate and a perpendicular magnetic recording layer on the substrate for storing data in a plurality of generally concentric tracks;
a slider having an air-bearing surface (ABS) facing the recording layer;
a laser;
an optical waveguide on the slider and coupled to the laser, the waveguide having a generally rectangularly-shaped laser radiation output end at the ABS, the waveguide output end having an along-the-track thickness and a cross-track width greater than the along-the-track thickness for generating an optical spot on the disk to heat an area of the recording layer as the disk rotates, the optical spot having a generally elliptical shape with its long axis extending across multiple tracks;
a write head on the slider and having a write pole tip at the ABS with a trailing edge spaced down-track from the waveguide output end in the along-the-track direction, the pole tip generating at its trailing edge a magnetic write field to magnetize regions of the recording layer in the heated area, the magnetized regions having a cross-track width generally equal to the cross-track width of the write pole;
an actuator connected to the slider for moving the slider generally radially across the disk, the actuator being capable of moving the pole tip in an increment less than the cross-track width of the pole tip, whereby the pole tip may generate partially overlapping generally circular paths of magnetic regions with the non-overlapping generally circular paths of magnetic regions forming the concentric tracks; and
a read head having a sensing edge at the ABS for reading magnetized regions in the tracks.
7. The disk drive of claim 6 wherein the ratio of the optical waveguide’s cross-track width to its along-the-track thickness being greater than or equal to 4 and less than or equal to 12.
8. The disk drive of claim 6 wherein the ratio of the width of the waveguide output end to the distance from the center of the waveguide output end to the trailing edge of the write pole tip is greater than or equal to 2 and less than or equal to 12.
9. The disk drive of claim 6 wherein the long axis of the generally elliptically-shaped optical spot extends across at least 20 tracks.
10. The disk drive of claim 9 wherein the long axis of the generally elliptically-shaped optical spot extends across at least 40 tracks and up to 120 tracks.
11. The disk drive of claim 6 wherein the optical waveguide is a rectangular waveguide having a core with a first index-of-refraction, a cladding layer with a second index-of-refraction less than said first index-of-refraction on the side of the core facing the pole tip, and a cladding layer with an index-of-refraction between said first and second indices of refraction on the side of the core opposite the side facing the pole tip.
12. The disk drive of claim 11 wherein the core is formed essentially of Ta2O5, the cladding layer on the side of the core facing the pole tip is formed essentially of one of SiO2 and Al2O3, and the cladding layer on the side of the core opposite the side facing the pole tip is formed of a composite selected from SiO2\u2014Ta2O5 and Al2O3\u2014Ta2O5.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A compound selected from a group consisting of the following structures:
wherein
each R2 is independently selected from the group consisting of hydrogen and substituted or unsubstituted alkyl groups,
R3 is selected from the group consisting of substituted and unsubstituted heteroaromatic rings and substituted and unsubstituted heterocyclic rings, said rings being linked to the triazine group through a nitrogen atom within the of R3, and when R3, is a substituted or unsubstituted heteroaromatic ring and said substituted or unsubstituted heteroaromatic ring has a postive charge associated therewith, R3 has a counterion X\u2212 associated therewith,
each M+ is a noble metal cation; and
wherein the anionic and cation components of said structure are present at a molar ratio so as to result in an overall neutral charge.
2. The compound of claim 1 wherein each R2 is independently selected from the group consisting of hydrogen, unsubstituted alkyl groups, alkyl groups substituted with a hydroxy or halide functional group, and alkyl groups having an ether, ester, or sulfonyl moiety therein.
3. The compound of claim 2 wherein R3 is a substituted or unsubstituted heteroaromatic ring selected from the group consisting of substituted or unsubstituted pyridine, pyridazine, pyrimidine, pyrazine, imidazole, oxazole, isoxazole, thiazole, oxadiazole, thiadiazole, pyrazole, triazole, triazine, quinoline, and isoquinoline.
4. The compound of claim 3 wherein R3 is a substituted or unsubstituted heteroaromatic ring selected from substituted or unsubstituted pyridine or imidazole.
5. The compound of claim 4 wherein R3 is selected horn the group consisting of pyridinium-1-yl, 4-(dimethylamino)pyridinium-1-yl, 3-methylimidazolium-1-yl, 4-(pyrrolidin-1-yl)pyridinium-1-yl, 4-isopropyridinium-1-yl, 4(2-hydroxyethyl)methylaminopyridinium-1-yl, 4-(3-hydroxypropyl)pyridinium-1yl, 4methylpyridinium-1-yl, quinolinium-1-yl, 4-tert-butylpyridinium-1-yl, and 3-(2-sulfoethyl)pyridinium-1-yl.
6. The compound of claim 1 wherein each M+ is selected from the group consisting of a Ag cation, a Au cation, and a Pt cation.
7. The compound of claim 6 wherein each M+ is a Au cation.
8. The compound of claim 1 wherein each M+ is a Fe cation.
9. The compound of claim 1 represented by following structure:
10. The compound of claim 9 represented by the following structure:
11. The compound of claim 10 wherein each M+ is a Au cation.
12. The compound of claim 10 wherein X\u2212 is selected from the group consisting of HSO4\u2212, Cl\u2212, CH3COO\u2212, and CF3COO\u2212.
13. A method of making oriented metallic nanostructures comprising (a) applying a solution comprising the compound of claim 1 to a surface of a substrate and (b) reducing the metal cation.
14. The method of claim 13 further comprising removing said at least one anionic component such that oriented metallic nanostructures remain or the surface.
15. A compound selected from a group consisting of the following structures:
wherein
each R2 is independently selected from the group consisting of hydrogen, unsubstituted alkyl groups, alkyl groups substituted with a hydroxy or halide functional group, and alkyl groups comprising an ether, ester, or sulfonyl moiety;
R3 is a substituted or unsubstituted heteroaromatic ring selected from the group consisting of substituted or unsubstituted pyridine, pyridazine, pyrimidine, pyrazine, imidazole, oxazole, isoxazole, thiazole, oxadiazole, thiadiazole, pyrazole, triazole, triazine, quinoline, and isoquinoline, and when said substituted, or unsubstituted heteroaromatic ring has a positive charge associated therewith, R3 has a counterion X\u2212 associated therewith;
each M+ is a noble metal cation; and
wherein the anionic and cation components of said structure are present at a molar ratio so as to result in an overall neutral charge.
16. A method of making metallic nanostructures comprising (a) applying a solution comprising the compound of claim 15 to a surface of a substrate and (b) reducing the metal cation.
17. The method of claim 16 further comprising:
orienting the solution on the surface of the substrate; and
removing said at least one amonic component such that oriented metallic nanostructures remain of the surface.
18. A compound of the following structure:
wherein
M+ is a metal cation selected from the group consisting of a Ag action, a Au cation and a Pt cation; and.
wherein the anionic and cation components of said structure are present at a molar ratio so as to result in an overall neutral charge.
19. A method of making metallic nanostructures comprising (a) applying a solution comprising the compound of claim 18 to a surface of a substrate and (b) reducing the metal cation.