Vacancy center material with highly efficient RF excitation

• US 10,338,164 B2
• Filed: 03/24/2017
• Issued: 07/02/2019
• Est. Priority Date: 03/24/2017
• Status: Active Grant

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Hahn, Joseph W., Mandeville, Andrew Raymond, Bruce, Gregory Scott
• Primary Examiner(s): Fuller, Rodney E
• Application Number:
  US15/468,282
• Publication Number:
  US 20180275220A1
• Time in Patent Office: 830 Days
• Field of Search: 324301
• CPC Class Codes: G01R 33/032 using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
• CPC Class Codes: G01R 33/26 using optical pumping

Abstract

A system for magnetic detection includes a magneto-optical defect center material comprising a plurality of magneto-optical defect centers, an optical light source , an optical detector, and a radio frequency (RF) excitation source. The optical light source is configured to provide optical excitation to the magneto-optical defect center material. The optical detector is configured to receive an optical signal emitted by the magneto-optical defect center material. The RF excitation source is configured to provide RF excitation to the magneto-optical defect center material. The RF excitation source includes an RF feed connector, and a metallic material coated on the magneto-optical defect center material and electrically connected to the RF feed connecter.

Claims

1. A system for magnetic detection, comprising:

a magneto-optical defect center material comprising a plurality of magneto-optical defect centers;

an optical light source configured to provide optical excitation to the magneto-optical defect center material;

an optical detector configured to receive an optical signal emitted by the magneto-optical defect center material; and

a radio frequency (RF) excitation source configured to provide RF excitation to the magneto-optical defect center material, the RF excitation source comprising;

an RF feed connector; and

a metallic material coated on the magneto-optical defect center material and electrically connected to the RF feed connecter.

2. The system of claim 1, wherein the RF excitations source further comprises:

a circuit board comprising an insulating board and conductive traces formed on the insulating board, the conductive traces electrically connecting the RF feed connector to the metallic material.

3. The system of claim 2, wherein the conductive traces comprise a first trace having a first width and a first length, and a second trace contacting the first trace, the second trace having a second width and a second length different from the first width and the first length.

4. The system of claim 3, where the second width matches the width of the magneto-optical defect center material.

5. The system of claim 1, wherein metallic material is at least one of gold, copper, silver, or aluminum.

6. The system of claim 1, wherein metallic material is coated at least over a top surface of the magneto-optical defect center material.

7. A system for magnetic detection, comprising:

a nitrogen vacancy (NV) diamond material comprising a plurality of NV centers;

an optical light source configured to provide optical excitation to the NV diamond material;

an optical detector configured to receive an optical signal emitted by the NV diamond material; and

a radio frequency (RF) excitation source configured to provide RF excitation to the NV diamond material, the RF excitation source comprising;

an RF feed connector; and

a metallic material coated on the NV diamond material and electrically connected to the RF feed connecter.

8. The system of claim 7, wherein the RF excitations source further comprises:

a circuit board comprising an insulating board and conductive traces formed on the insulating board, the conductive traces electrically connecting the RF feed connector to the metallic material.

9. The system of claim 8, wherein the conductive traces comprise a first trace having a first width and a first length, and a second trace contacting the first trace, the second trace having a second width and a second length different from the first width and the first length.

10. The system of claim 9, where the second width matches the width of the NV diamond material.

11. The system of claim 7, wherein metallic material is at least one of gold, copper, silver, or aluminum.

12. The system of claim 7, wherein metallic material is coated at least over a top surface and a bottom surface of the NV diamond material.

13. A system for magnetic detection, comprising:

a magneto-optical defect center material comprising a plurality of magneto-optical defect centers;

a radio frequency (RF) excitation source configured to provide RF excitation to the magneto-optical defect center material;

an optical detector configured to receive an optical signal emitted by the magneto-optical defect center material; and

an optical light source comprising;

a readout optical light source configured to provide optical excitation to the magneto-optical defect center material to transition relevant magneto-optical defect center electrons to excited spin states in the magneto-optical defect center material; and

a reset optical light source configured to provide optical light to the magneto-optical defect center material to reset spin states in the magneto-optical defect center material to a ground state,

wherein the RF excitation light source comprises a block portion having a support portion which supports the magneto-optical defect center material, the block portion having a first wall portion adjacent to and on one side of the support portion and a second wall portion adjacent to and on another side of the support portion opposite to the first side, a face of the second wall portion being slanted with respect to a face of the first wall portion so as to allow light emitted by the readout optical light source and the reset optical light source to be directed to the magneto-optical defect center material.

14. The system of claim 13, wherein the block portion is formed of an electrically and thermally conductive material.

15. The system of claim 14 ,wherein the block portion is formed of one of copper or aluminum.

16. The system of claim 13, wherein the block portion is a heat sink.

17. The system of claim 13, wherein the block portion has side holes and bottom holes to allow for side mounting and bottom mounting, respectively, of the block portion.

18. The system of claim 13, wherein the RF excitation source comprises:

an RF feed connector; and

a metallic material coated on the magneto-optical defect center material and electrically connected to the RF feed connecter.

19. The system of claim 18, wherein upon the RF feed connector being driven by an RF signal, the metallic material shorts to the block portion.

20. A system for magnetic detection, comprising:

a nitrogen vacancy (NV) diamond material comprising a plurality of NV centers;

a radio frequency (RF) excitation source configured to provide RF excitation to the NV diamond material;

an optical detector configured to receive an optical signal emitted by the NV diamond material; and

an optical light source comprising;

a readout optical light source configured to provide optical excitation to the NV diamond material to transition relevant NV center electrons to excited spin states in the NV diamond material; and

a reset optical light source configured to provide optical light to the NV diamond material to reset spin states in the NV diamond material to a ground state,

wherein the RF excitation light source comprises a block portion having a support portion which supports the NV diamond material, the block portion having a first wall portion adjacent to and on one side of the support portion and a second wall portion adjacent to and on another side of the support portion opposite to the first side, a face of the second wall portion being slanted with respect to a face of the first wall portion so as to allow light emitted by the readout optical light source and the reset optical light source to be directed to the NV diamond material.

21. The system of claim 20, wherein the block portion is formed of an electrically and thermally conductive material.

22. The system of claim 20, wherein the block portion is formed of one of copper or aluminum.

23. The system of claim 20, wherein the block portion is a heat sink.

24. The system of claim 20, wherein the block portion has side holes and bottom holes to allow for side mounting and bottom mounting, respectively, of the block portion.

25. The system of claim 20, wherein the RF excitation source comprises:

an RF feed connector; and

a metallic material coated on the NV diamond material and electrically connected to the RF feed connecter.

26. The system of claim 25, wherein upon the RF feed connector being driven by an RF signal, the metallic material shorts to the block portion.