IP Library › Granted Patent US 12,391,553
Granted Patent B2
US 12,391,553 · App. 16/648,076 · Granted Aug 19, 2025

Synthetic engineered diamond materials with spin impurities and methods of making the same

Inventors: Nathalie de Leon (Princeton, NJ); Brendon C. Rose (Princeton, NJ); Ding Huang (Jersey City, NJ); Zi-Huai Zhang (Princeton, NJ); Alexei M. Tyryshkin (Yardley, PA); Sorawis Sangtawesin (Bangkok, TH); Srikanth Srinivasan (Princeton, NJ); Matthew Lee Markham (Cholsey, GB); Andrew Mark Edmonds (Didcot, GB); Daniel J. Twitchen (Bucks, GB); Stephen A. Lyon (Princeton, NJ)
Assignees: The Trustees of Princeton University; Element Six Technologies Limited
C01B32/28C09K11/59B82Y20/00C01P2006/60
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Quick Facts
Patent No.
US 12,391,553
App. No.
16/648,076
Granted
Aug 19, 2025
Kind
B2
Abstract

Disclosed are synthetic diamond materials for quantum and optical applications, such as quantum information processing, quantum key distribution, quantum repeaters, and quantum sensing devices, based on spin defects in diamond. This includes methods for synthesizing and treating diamond in order to create spin defects with improved spin coherence and optical emission properties, as well as treating the diamond to eliminate unwanted defects that degrade these properties.

Claims (11)

1. A composition of matter, comprising:

carbon in a diamond lattice;

a neutral silicon vacancy center (SiV 0 ) in the diamond lattice;

wherein the composition of matter displays a photoluminescence emission peak arising from the neutral silicon vacancy centers around 946 nm; and

wherein a zero phonon line for the neutral silicon vacancy center has a full width half maximum intrinsic inhomogeneous zero phonon line width of no more than 500 MHz over a time scale of at least 1 ms at temperatures below 40 K.

2. The composition of matter of claim 1 , wherein at least one neutral silicon vacancy center is no more than 1 micron from a surface of the composition of matter.

3. The composition of matter of claim 1 , further comprising acceptor dopants in the diamond lattice at a concentration of less than or equal to 3 ppm.

4. The composition of matter of claim 1 , further comprising a total concentration of silicon in the diamond lattice at a concentration of less than or equal to 1 ppm, wherein the ratio of neutral silicon vacancy centers to 28 Si is at least 4:1.

5. The composition of matter of claim 1 , wherein a neutral silicon vacancy center has an optical linewidth between 1 and 20 times the transform limited linewidth determined by the bulk photoluminescence excited state lifetime limit.

6. The composition of matter of claim 1 , wherein the neutral silicon vacancy center is configured to have a spin relaxation time of between 20 seconds and 500 seconds when below 20 K, the neutral silicon vacancy center is configured to have an electron spin coherence time of between 0.5 milliseconds and 1 second when below 20 K, a silicon isotope incorporated in the neutral silicon vacancy center is 29Si, the percentage of 13 C in the diamond lattice is suppressed below natural abundance, or a combination thereof.

7. The composition of matter of claim 1 , wherein the zero phonon line for a neutral silicon vacancy center has a full width half maximum intrinsic inhomogeneous zero phonon line width selected from any of the group consisting of no more than 250 MHz and no more than 100 MHz.

Assignments (4)
CORRECTIVE ASSIGNMENT TO CORRECT THE TYPO ON COVER SHEET 2ND ASSIGNEE'S ADDRESS DICOT IN THE INTERNAL ADDRESS PREVIOUSLY RECORDED ON REEL 054705 FRAME 0584. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Sep 22, 2023
From: THE TRUSTEES OF PRINCETON UNIVERSITY
To: THE TRUSTEES OF PRINCETON UNIVERSITY; ELEMENT SIX TECHNOLOGIES LIMITED
Reel/Frame 065015/0948 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 21, 2020
From: THE TRUSTEES OF PRINCETON UNIVERSITY
To: THE TRUSTEES OF PRINCETON UNIVERSITY; ELEMENT SIX TECHNOLOGIES LIMITED
Reel/Frame 054705/0584 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 13, 2020
From: DE LEON, NATHALIE; ROSE, BRENDON C.; HUANG, DING; ZHANG, ZI-HUAI; TYRYSHKIN, ALEXEI M.; SANGTAWESIN, SORAWIS; SRINIVASAN, SRIKANTH; MARKHAM, MATTHEW LEE; EDMONDS, ANDREW MARK; TWITCHEN, DANIEL J.; LYON, STEPHEN A.
To: THE TRUSTEES OF PRINCETON UNIVERSITY
Reel/Frame 052650/0347 →
CONFIRMATORY LICENSE Recorded Apr 30, 2020
From: PRINCETON UNIVERSITY
To: NATIONAL SCIENCE FOUNDATION
Reel/Frame 052533/0660 →
Continuity (2)
Provisional Application 62559918 · Sep 18, 2017
Related Publication 20200277196A1 · Sep 3, 2020
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