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arXiv · 2303.10524

Fresnel-type Solid Immersion Lens for efficient light collection from quantum defects in diamond

SungJoon Park·Gyeonghun Kim·Kiho Kim·Dohun Kim
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Abstract

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 um-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.

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SungJoon Park, Gyeonghun Kim, Kiho Kim, Dohun Kim. 2023-03-19. Fresnel-type Solid Immersion Lens for efficient light collection from quantum defects in diamond. https://doi.org/10.1364/oe.487913

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