Three dimensional optical memory device

Patent metadata

Field	Value
Publication number	US-9984751-B1
Application number	US-201715415599-A
Country	US
Kind code	B1
Filing date	Jan 25, 2017
Priority date	Nov 7, 2016
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A system includes a data storage medium comprising layers, an excitation circuit, and an emitter. Each layer comprises cells arranged in a horizontal plane. Cells in different layers are arranged in a vertical plane of the data storage medium. The excitation circuit excites a layer during excitation period. Exciting the layer changes an optical property of the layer during the excitation period. The emitter emits a first and a second beam onto a first and a second cell of the layer being excited during the excitation period to orient electrical charges within the first and the second cell to a first and second oriented values and their intensity to a first and second intensity values respectively. The first and second cells maintain the first and second oriented values and the first and second intensity values after the excitation period is over or in absence of the layer being excited.

First claim

What is claimed is:

1. An system comprising:
a data storage medium comprising a plurality of layers, wherein each layer comprises a plurality of cells that are arranged in a horizontal plane of the data storage medium with respect to one another, and wherein cells in different layers of the plurality of layers are arranged in a vertical plane of the data storage medium with respect to one another, and wherein each cell is configured to store electric field information;
an excitation circuit configured to excite a layer of the plurality of layers during excitation period, wherein exciting the layer of the plurality of layers changes an optical property of the layer during the excitation period; and
an emitter configured to emit a beam onto a cell of the layer being excited during the excitation period to store the electric field information thereto, and wherein the beam being emitted onto the cell of the layer being excited during the excitation period changes electrical characteristics of the cell of the layer being excited during the excitation period, wherein the cell of the layer being excited maintains the changed electrical characteristics after the excitation period is over or in absence of the layer of the plurality of layers being excited, and wherein the changed electrical characteristics maintained by the cell of the layer being excited are the electric field information to be stored onto the data storage medium, and wherein the change to the optical property includes a refractive changes and reflective changes, and wherein the optical property associated with the cell of the layer being excited changes to its original optical property after the excitation period is over and maintains the oriented electric field information within the layer being excited.

2. The system as described in claim 1 , wherein the data storage medium comprises transparent material.

3. The system as described in claim 1 , wherein the emitter is a femtosecond laser and wherein the beam is laser.

4. The system as described in claim 1 , wherein the excitation circuit is configured to apply an alternating current (AC) voltage to the layer of the plurality of layers during the excitation period.

5. The system as described in claim 1 , wherein the excitation circuit is configured to apply a radio frequency (RF) up to an optical frequency of the layer to excite the layer of the plurality of layers during the excitation period.

6. The system as described in claim 1 , wherein the electric field information comprises orientation of an electric field.

7. The system as described in claim 1 , wherein the electric field information comprises intensity of an electric field, wherein the intensity is controlled by a power of the beam emitted by the emitter.

8. The system as described in claim 1 , wherein a value of the electric field information has at least three possible values.

9. An system comprising:
a data storage medium comprising a plurality of layers, wherein each layer comprises a plurality of cells that are arranged in a horizontal plane of the data storage medium with respect to one another, and wherein cells in different layers of the plurality of layers are arranged in a vertical plane of the data storage medium with respect to one another;
an excitation circuit configured to excite a layer of the plurality of layers during excitation period, wherein exciting the layer of the plurality of layers changes an optical property of the layer during the excitation period; and
an emitter configured to emit a first beam onto a first cell of the layer being excited during the excitation period to orient electrical charges within the first cell to a first oriented value and their intensity to a first intensity value, and wherein the emitter is further configured to emit a second beam onto a second cell of the layer being excited during the excitation period to orient electrical charges within the second cell to a second oriented value and their intensity to a second intensity value, wherein the first cell maintains the first oriented value and the first intensity value after the excitation period is over or in absence of the layer being excited and wherein the second cell maintains the second oriented value and the second intensity value after the excitation period is over or in absence of the layer being excited, and wherein the change to the optical property includes a refractive changes and reflective changes, and wherein the optical property associated with the layer being excited changes to its original optical property after the excitation period is over.

10. The system as described in claim 9 , wherein the data storage medium comprises transparent material.

11. The system as described in claim 9 , wherein the emitter is a femtosecond laser and wherein the first beam is laser.

12. The system as described in claim 9 , wherein the excitation circuit is configured to apply an alternating current (AC) voltage to the layer of the plurality of layers during the excitation period.

13. The system as described in claim 9 , wherein the excitation circuit is configured to apply a radio frequency (RF) up to an optical frequency of the layer to excite the layer of the plurality of layers during the excitation period.

14. The system as described in claim 9 , wherein the first oriented value is different from the second oriented value and wherein the first intensity value is different from the second intensity value, and wherein the first beam and the second beam are emitted simultaneously to the first cell and the second cell during the excitation period.

15. The system as described in claim 9 , wherein the first oriented value has at least three possible values and the first intensity value has at least three possible values.

16. An system comprising:
a data storage medium comprising a plurality of layers, wherein each layer comprises a plurality of cells that are arranged in a horizontal plane of the data storage medium with respect to one another, and wherein cells in different layers of the plurality of layers are arranged in a vertical plane of the data storage medium with respect to one another;
an excitation circuit configured to excite a first layer of the plurality of layers during a first excitation period and a second layer of the plurality of layers during a second excitation period, wherein the excitation circuit is configured to excite different layers of the plurality of layers independent from one another, wherein exciting the first layer and the second layer changes an optical property of the first layer and the second layer during excitation periods associated therewith; and
an emitter configured to emit a first beam onto a first cell of the first layer being excited during the first excitation period to orient electrical charges of the first cell to a first oriented value and their intensity to a first intensity value, and wherein the emitter is further configured to emit a second beam onto a second cell of the second layer being excited during the second excitation period to orient electrical charges of the second cell to a second oriented value and their intensity to a second intensity value, wherein the first cell maintains the first oriented value and the first intensity value after the first excitation period is over or in absence of the first layer being excited and wherein the second cell maintains the second oriented value and the second intensity value after the second excitation period is over or in absence of the second layer being excited.

17. The system as described in claim 16 , wherein the

Assignees

• Seagate Technology Llc

Inventors

• Ahner Joachim
• Tung David Marcus

Classifications

• G11C13/047 Primary

  using electro-optical elements (G11C13/042 takes precedence) · CPC title

• G11C13/048

  using other optical storage elements · CPC title