Reconfigurable interference

Patent metadata

Field	Value
Publication number	US-11143931-B2
Application number	US-201916251197-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Aug 24, 2017
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

Aspects of the present disclosure are directed to a reconfigurable interference device comprising a phase change structure. The phase change structure comprises a solid-state phase change material having a first phase state and a second phase state dependent on temperature. A first energy source is configured to supply an initialization energy to initialize a plurality of domains having the first phase state and a second energy source is configured to supply an electrical current to the structure to position the plurality of domains of the first phase state within the phase change structure. A control unit is configured to control the first and the second energy source and to create a periodic interference pattern comprising a plurality of domains of the first phase state and a plurality of domains of the second phase state in an alternating pattern.

First claim

What is claimed is:

1. A reconfigurable interference device, comprising
a phase change structure comprising a solid-state phase change material, the solid-state phase change material having a first phase state and a second phase state;
a first energy source configured to supply an initialization energy to initialize a plurality of domains into the first phase state;
a second energy source configured to supply an electrical current to the phase change structure to position the plurality of domains in the first phase state within the phase change structure; and
a control unit configured to control the first and second energy sources to create a periodic interference pattern.

2. The interference device according to claim 1 , wherein the device is configured to create domains of the first phase state and the second phase state of variable width and/or position.

3. The interference device according to claim 1 , wherein the first phase state is a metallic state and the second phase state is an insulating state.

4. The interference device according to claim 1 , wherein the device is configured to control the width of the first domains by supplying concurrently an initialization energy by the first energy source and an electrical current by the second energy source.

5. The interference device according to claim 4 , wherein the device is configured to control the width by varying the time period during which the initialization energy and the electrical current are concurrently supplied.

6. The interference device according to claim 1 , wherein the device is configurable as an interference filter.

7. The interference device according to claim 6 , wherein the device is configured to tune the center frequency of the interference filter.

8. The interference device according to claim 1 , wherein the device is configurable as an optical mirror.

9. The interference device according to claim 8 , wherein the device is configurable to tune the center frequency of the optical mirror, thereby operating as a spectrometer.

10. The interference device according to claim 1 ,
wherein the first energy source is a heat source configured to supply heat to a first area of the phase change structure, thereby creating a domain having the first phase state.

11. The interference device according to claim 1 ,
wherein the first energy source is a piezoelectric device configured to apply strain to a first area of the phase change structure, thereby creating a domain having the first phase state.

12. The interference device according to claim 10 , wherein the heat source is configured to supply heat pulses to the first area.

13. The interference device according to claim 10 , wherein the heat source is configured to continuously supply heat, wherein the interference device further comprises a thermal switch coupled to the heat source, the thermal switch being configured to control the heat transferred from the heat source to the first area.

14. The interference device according to claim 1 , wherein the first energy source is an electric field source configured to apply an electric field on a first area of the phase change structure, thereby creating a domain having the first phase state.

15. The interference device according to claim 1 , wherein the device is configured to maintain a temperature of the first domains between a first transition temperature and a second transition temperature.

16. The interference device according to claim 1 , wherein the control unit is configured to control the amplitude and frequency of the electrical current supplied by the second energy source.

17. The interference device according to claim 1 , wherein the solid state phase change material is selected from the group consisting of VO 2 , V 4 O 7 , V 6 O 11 , V 2 O 3 , V 6 O 13 , V 5 O 9 , VO, V 8 O 15 , NbO 2 , Ti 2 O 3 , LaCoO 3 , Ti 3 O 5 , SmNiO 3 , NdNiO 3 , PrNiO 3 and Fe 3 O 4 .

18. A method for configuring an interference device, the interference device comprising a phase change structure comprising a solid-state phase change material, the solid-state phase change material having a first phase state and a second phase state, the method comprising:
supplying, by a first energy source, an initialization energy to initialize a plurality of domains having the first phase state;
supplying, by a second energy source, an electrical current to the phase change structure to position the plurality of domains of the first phase state within the phase change structure; and
controlling, by a control unit, the first and the second energy source to create a periodic interference pattern.

19. The method according to claim 18 , the method further comprising:
reconfiguring the interference device by creating a second periodic interference pattern comprising in an alternating way a plurality of domains of the first phase state and a plurality of domains of the second phase state, wherein the domains of the second periodic interference pattern have a different width and position than the domains of the first interference pattern.

20. A computer program product for controlling a reconfigurable interference device, comprising a phase change structure comprising a solid-state phase change material, the solid-state phase change material having a first phase state and a second phase state, said computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by the reconfigurable interference device to perform a method comprising:
supplying, by a first energy source, an initialization energy to initialize a plurality of domains having the first phase state;
supplying, by a second energy source, an electrical current to the phase change structure to position the plurality of domains of the first phase state within the phase change structure;
controlling, by a control unit, the first and the second energy source to create a periodic interference pattern.

Assignees

• IBM

Inventors

• Gooth Johannes
• Gotsmann Bernd
• Menges Fabian

Classifications

• G02B26/0808 Primary

  by means of one or more diffracting elements · CPC title

• G11B7/00

  Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation {by modifying optical properties or the physical structure}, reproducing using an optical beam at lower power {by sensing optical properties}; Record carriers therefor (G11B11/00, G11B13/00 take precedence) · CPC title

• G01J2003/1247

  Tuning · CPC title

• G02F1/21

  by interference · CPC title

• G02F2203/15

  involving resonance effects, e.g. resonantly enhanced interaction · CPC title