Magnetic plasmonic nanoparticle positioned on a magnetic plasmonic substrate

Patent metadata

Field	Value
Publication number	US-2017076843-A1
Application number	US-201514853370-A
Country	US
Kind code	A1
Filing date	Sep 14, 2015
Priority date	Sep 14, 2015
Publication date	Mar 16, 2017
Grant date	—

Abstract

Described embodiments include a system, method, and apparatus. The apparatus includes a magnetic substrate at least partially covered by a first negative-permittivity layer comprising a first plasmonic outer surface. The apparatus includes a plasmonic nanoparticle having a magnetic element at least partially covered by a second negative-permittivity layer comprising a second plasmonic outer surface. The apparatus includes a dielectric-filled gap between the first plasmonic outer surface and the second outer surface. The first plasmonic outer surface, the dielectric-filled gap, and the second plasmonic outer surface are configured to support one or more mutually coupled plasmonic excitations.

First claim

1 . An apparatus comprising:
a magnetic substrate at least partially covered by a first negative-permittivity layer comprising a first plasmonic outer surface; a plasmonic nanoparticle having a magnetic element at least partially covered by a second negative-permittivity layer comprising a second plasmonic outer surface; and a dielectric-filled gap between the first plasmonic outer surface and the second plasmonic outer surface; wherein the first plasmonic outer surface, the dielectric-filled gap, and the second plasmonic outer surface are configured to support bonding surface plasmons, and wherein the plasmonic nanoparticle is retained on the first plasmonic outer surface by a magnetic attraction between the magnetic substrate and the magnetic element of the plasmonic nanoparticle.

2 . The apparatus of claim 1 , wherein the magnetic substrate includes a magnetisable substrate.

3 .- 4 . (canceled)

5 . The apparatus of claim 1 , wherein the magnetic substrate includes a plurality of magnetized landing or retention areas each configured to magnetically attract the magnetic element of the plasmonic nanoparticle.

6 .- 7 . (canceled)

8 . The apparatus of claim 1 , wherein the magnetic substrate includes a magnetic substrate having a switchable magnetic state.

9 . The apparatus of claim 1 , wherein the first plasmonic outer surface or the second plasmonic outer surface includes an adhesive configured to bond the plasmonic nanoparticle with the magnetic substrate.

10 . The apparatus of claim 1 , wherein the first negative-permittivity layer has negative permittivity within a defined frequency range.

11 . The apparatus of claim 1 , wherein the second negative-permittivity layer has negative permittivity within a defined frequency range.

12 . The apparatus of claim 1 , wherein the first negative-permittivity layer includes a metallic layer.

13 . The apparatus of claim 1 , wherein the first negative-permittivity layer includes a semi-metallic layer.

14 . The apparatus of claim 1 , wherein the first negative-permittivity layer includes a semiconductor layer.

15 . (canceled)

16 . The apparatus of claim 1 , wherein the plasmonic nanoparticle includes a plasmonic nanocube particle.

17 . (canceled)

18 . The apparatus of claim 1 , wherein the plasmonic nanoparticle includes a plasmonic nanorod.

19 . The apparatus of claim 1 , wherein the plasmonic nanoparticle includes a decahedra, cage, spheroid, or triangular nanoprism shaped plasmonic nanoparticle.

20 . The apparatus of claim 1 , wherein the plasmonic nanoparticle has a size ranging between 1-100 nm.

21 . The apparatus of claim 1 , wherein the plasmonic nanoparticle has a size ranging between 20 and 400 nm.

22 . The apparatus of claim 1 , wherein the plasmonic nanoparticle includes a plasmonic nanoparticle having an arbitrary shape.

23 . The apparatus of claim 1 , wherein the plasmonic nanoparticle includes a first plasmonic nanoparticle and a second plasmonic nanoparticle, the first plasmonic nanoparticle comprising a first magnetic element having a first magnetic strength and the second plasmonic nanoparticle comprising a second magnetic element having a second magnetic strength different from the first magnetic strength.

24 . The apparatus of claim 1 , wherein the magnetic element includes a magnetic core.

25 . The apparatus of claim 1 , wherein the magnetic element includes a ferromagnetic or paramagnetic element.

26 .- 29 . (canceled)

30 . The apparatus of claim 1 , wherein the second negative-permittivity layer includes a noble metal.

31 .- 32 . (canceled)

33 . The apparatus of claim 1 , wherein the second negative-permittivity layer includes a metallic layer.

34 . The apparatus of claim 1 , wherein the second negative-permittivity layer includes a semimetal layer.

35 . (canceled)

36 . The apparatus of claim 1 , wherein the second negative-permittivity layer includes an adhesive configured to bond the plasmonic nanoparticle and the magnetic substrate.

37 . The apparatus of claim 1 , wherein at least a portion of the dielectric-filled gap comprises a dielectric coating applied to the first plasmonic outer surface of the magnetic substrate or to the second plasmonic outer surface of the plasmonic nanoparticle.

38 . (canceled)

39 . The apparatus of claim 1 , wherein the dielectric-filled gap is less than 200 nm.

40 . (canceled)

41 . The apparatus of claim 1 , wherein the dielectric-filled gap is less than 50 nm.

42 . (canceled)

43 . The apparatus of claim 1 , wherein the dielectric-filled gap is greater than 5 nm and less than 50 nm.

44 .- 45 . (canceled)

46 . The apparatus of claim 1 , wherein the magnetic substrate and the magnetic element of the plasmonic nanoparticle are configured to magnetically interact.

47 .- 48 . (canceled)

49 . The apparatus of claim 46 , wherein the magnetic attraction between the magnetic substrate and the magnetic element of the plasmonic nanoparticle controls a dimension of the dielectric-filled gap.

50 . The apparatus of claim 1 , wherein the plasmonic nanoparticle includes two plasmonic nanoparticles, and wherein the two plasmonic nanoparticles of the plurality of plasmonic nanoparticles are deposited on the magnetic substrate in a dimer configuration.

51 . An apparatus comprising:
a magnetic substrate at least partially covered by a first negative-permittivity layer comprising a first plasmonic outer surface; a plurality of plasmonic nanoparticles, each plasmonic nanoparticle having a respective magnetic element at least partially covered by a second negative-permittivity layer comprising a second plasmonic outer surface; a respective dielectric-filled gap between the first plasmonic outer surface and the second plasmonic outer surface of each plasmonic nanoparticle of the plurality of plasmonic nanoparticles; wherein the first plasmonic outer surface, the dielectric-filled gap, and the second plasmonic outer surface of each plasmonic nanoparticle of the plurality of plasmonic nanoparticles are configured to support bonding surface plasmons, and wherein each plasmonic nanoparticle of the plurality of plasmonic nanoparticles is respectively retained on the first plasmonic outer surface by a magnetic attraction between the magnetic substrate and the magnetic element of the plasmonic nanoparticle.

52 . The apparatus of claim 51 , wherein the plurality of plasmonic nanoparticles were individually deposited in a controlled manner on the first plasmonic outer surface of the magnetic substrate.

53 .- 55 . (canceled)

56 . The apparatus of claim 52 , wherein the plurality of individually deposited magnetic plasmonic nanoparticles are respectively retained in their respective positions on the first plasmonic outer surface by a magnetic attraction between the magnetic substrate and the respective magnetic element of each individually deposited plasmonic nanoparticle.

57 .- 60 . (canceled)

61 . The apparatus of claim 51

Assignees

• Elwha Llc

Inventors

• Akselrod Gleb M
• Hyde Roderick A
• Ishikawa Muriel Y
• Kare Jordin T
• Mikkelsen Maiken H
• Pan Tony S
• Smith David R
• Tegreene Clarence T
• Urzhumov Yaroslav A
• Whitmer Charles
• Wood Jr Lowell L
• Wood Victoria Y H

Classifications

• G02B5/008

  Surface plasmon devices (diffractive gratings with a pitch less than or comparable to the wavelength G02B5/1809; surface plasmons in integrated optics G02B6/1226; optical analysis of materials by means of surface plasmons G01N21/553) · CPC title

• H01F1/0045 Primary

  Zero dimensional, e.g. nanoparticles, soft nanoparticles for medical/biological use (preparation of fullerenes in general C01B32/15) · CPC title

• H01F1/0018

  Diamagnetic or paramagnetic materials, i.e. materials with low susceptibility and no hysteresis (H01F1/0036 takes precedence) · CPC title

• H01F1/16

  in the form of sheets (H01F1/147 takes precedence) · CPC title

• H01F1/06 Primary

  in the form of particles, e.g. powder (H01F1/047 takes precedence {; record carriers G11B5/70605}) · CPC title