Lifetime Reduction and Enhanced Emission of Single Photon Color Centers in Nanodiamond via Surrounding Refractive Index Modification.

Abstract:

:The negatively-charged nitrogen vacancy (NV(-)) center in diamond is of great interest for quantum information processing and quantum key distribution applications due to its highly desirable long coherence times at room temperature. One of the challenges for their use in these applications involves the requirement to further optimize the lifetime and emission properties of the centers. Our results demonstrate the reduction of the lifetime of NV(-) centers, and hence an increase in the emission rate, achieved by modifying the refractive index of the environment surrounding the nanodiamond (ND). By coating the NDs in a polymer film, experimental results and numerical calculations show an average of 63% reduction in the lifetime and an average enhancement in the emission rate by a factor of 1.6. This strategy is also applicable for emitters other than diamond color centers where the particle refractive index is greater than the refractive index of the surrounding media.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Khalid A,Chung K,Rajasekharan R,Lau DW,Karle TJ,Gibson BC,Tomljenovic-Hanic S

doi

10.1038/srep11179

subject

Has Abstract

pub_date

2015-06-25 00:00:00

pages

11179

issn

2045-2322

pii

srep11179

journal_volume

5

pub_type

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