# US 8,570,643 B2 · Method of making optical element and optical element

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- Number: US 8,570,643 B2
- Document ID: US8570643B2
- Status: Granted
- Kind: B2
- Application number: 12/880,999
- Filed: 2010-09-13
- Published: 2011-03-17
- Granted: 2013-10-29
- Earliest claimed: 2009-09-15
- Assignees: Canon Kabushiki Kaisha
- Applicants: Daisuke Yamada
- Inventors: Daisuke Yamada
- Web page: https://patentgrep.com/patent/US8570643B2

## CPC

- H01Q 15/006: {Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces}
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- G02B 1/007: {made of negative effective refractive index materials}
- G02F 1/095: in an optical waveguide structure
- G02F 2202/30: Metamaterials
- Y10T 29/49016: Antenna or wave energy "plumbing" making
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method of making an optical element, the optical element including magnetic resonators that are anisotropically shaped and smaller than a wavelength of incident light, includes a first step of dispersing the magnetic resonators in a host medium, a second step of applying an external magnetic field to the host medium after the first step, and a third step of curing the host medium after the second step.

## Claims

### Claim 1

A method of making an optical element that includes magnetic resonators that are anisotropically shaped and smaller than a wavelength of incident light, the method comprising:
a first step of dispersing the magnetic resonators in a host medium;
a second step of applying an external magnetic field to the host medium after the first step; and
a third step of curing the host medium after the second step.

### Claim 2 (depends on 1)

The method of making the optical element according to claim 1,
wherein at least a part of each of the magnetic resonators that are dispersed in the host medium in the first step is made of a metal, and
wherein, in the second step of applying the external magnetic field to the host medium, an external alternating magnetic field that is the external magnetic field and an external alternating electric field having the same frequency as the external alternating magnetic field are respectively applied in directions perpendicular to each other so as to make the magnetic resonators have the same orientation.

### Claim 3 (depends on 2)

The method of making an optical element according to claim 2,
wherein the external alternating magnetic field and the external alternating electric field are applied in directions that are substantially parallel to an incident surface of the optical element.

### Claim 4 (depends on 1)

The method of making an optical element according to claim 1,
wherein at least a part of each of the magnetic resonators that are dispersed in the host medium in the first step is made of a magnetic substance, and
wherein, in the second step, the external magnetic field is applied to the host medium in which the magnetic resonators made of the magnetic substance are dispersed.

### Claim 5 (depends on 4)

The method of making an optical element according to claim 4,
wherein the magnetic substance is a diamagnetic substance, and the external magnetic field is applied in a direction that is substantially parallel to the incident surface of the optical element.

### Claim 6 (depends on 4)

A method of making an optical element according to claim 4,
wherein the magnetic substance is a paramagnetic substance or a ferromagnetic substance, and the external magnetic field is applied in a direction substantially perpendicular to the incident surface of the optical element.

### Claim 7 (depends on 1)

The method of making an optical element according to claim 1,
wherein, in the second step of applying the external magnetic field to the host medium in which the magnetic resonators are dispersed, the magnetic field is applied with different directions and with different strength in accordance with a position of the host medium.