Broadband Light Extraction from Near-Surface NV Centers Using Crystalline-Silicon Antennas

We use crystalline silicon (Si) antennas to efficiently extract broadband single-photon fluorescence from shallow nitrogen-vacancy (NV) centers in diamond into free space. Our design features relatively easy-to-pattern high-index Si resonators on the diamond surface to boost photon extraction by overcoming total internal reflection and Fresnel reflection at the diamond-air interface and providing modest Purcell enhancement, without etching or otherwise damaging the diamond surface. In simulations, ∼17 times more single photons are collected from a single NV center compared to the case without the antenna; in experiments, we observe an enhancement of ∼9 times, limited by spatial alignment between the NV and the antenna. Our approach can be readily applied to other color centers in diamond, and more generally to the extraction of light from quantum emitters in wide-bandgap materials.

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Publication Details

Journal
Nano Letters
Published
2025-03-17
DOI
https://doi.org/10.1021/acs.nanolett.4c04299
Citations
2
Primary Topic
Diamond and Carbon-based Materials Research
Type
article
Field-Weighted Citation Impact
1.04

Funders

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Broadband Light Extraction from Near-Surface NV Centers Using Crystalline-Silicon Antennas

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Broadband Light Extraction from Near-Surface NV Centers Using Crystalline-Silicon Antennas

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article en
2 citations

Abstract

We use crystalline silicon (Si) antennas to efficiently extract broadband single-photon fluorescence from shallow nitrogen-vacancy (NV) centers in diamond into free space. Our design features relatively easy-to-pattern high-index Si resonators on the diamond surface to boost photon extraction by overcoming total internal reflection and Fresnel reflection at the diamond-air interface and providing modest Purcell enhancement, without etching or otherwise damaging the diamond surface. In simulations, ∼17 times more single photons are collected from a single NV center compared to the case without the antenna; in experiments, we observe an enhancement of ∼9 times, limited by spatial alignment between the NV and the antenna. Our approach can be readily applied to other color centers in diamond, and more generally to the extraction of light from quantum emitters in wide-bandgap materials.

Nano LettersVol. 25(12)
Argonne National Laboratory (US), University of Wisconsin–Madison (US), Center for Nanoscale Materials
Wisconsin Alumni Research Foundation, Office of the Vice Chancellor for Research and Graduate Education, University of Wisconsin-Madison, Division of Chemistry, Basic Energy Sciences, Argonne National Laboratory
Affordable and clean energy
Openalex Percentile: Top 27%
Diamond and Carbon-based Materials Research
1.04
DOISourceOpenAlex
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