Fresnel-type solid immersion lens for efficient light collection from quantum defects in diamond

Quantum defects in diamonds have been studied as a promising resource for quantum science. The subtractive fabrication process for improving photon collection efficiency often require excessive milling time that can adversely affect the fabrication accuracy. We designed and fabricated a Fresnel-type...

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Bibliographic Details
Published in:Optics express 2023-06, Vol.31 (12), p.20586-20594
Main Authors: Park, SungJoon, Koh, Young-Seo, Kang, Dongyeon Daniel, Kim, Gyeonghun, Kim, Kiho, Kim, Dohun
Format: Article
Language:English
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Summary:Quantum defects in diamonds have been studied as a promising resource for quantum science. The subtractive fabrication process for improving photon collection efficiency often require excessive milling time that can adversely affect the fabrication accuracy. We designed and fabricated a Fresnel-type solid immersion lens using the focused ion beam. For a 5.8 µm-deep Nitrogen-vacancy (NV ) center, the milling time was highly reduced (1/3 compared to a hemispherical structure), while retaining high photon collection efficiency (> 2.24 compared to a flat surface). In numerical simulation, this benefit of the proposed structure is expected for a wide range of milling depths.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.487913