Fabrication of Solid Immersion Lenses Centered on NV Centers for Enhanced Quantum Sensing

<p>This study presents a novel fabrication technique for solid immersion lenses (SILs) precisely centered around nitrogen-vacancy (NV) centers in diamond, enabling significant enhancements in quantum sensing and imaging applications. By employing advanced microfabrication methods, sub-micron alignment accuracy between the SIL and the NV center achieved, maximizing photon collection efficiency and optical resolution. The fabricated lenses exhibit superior optical properties, including high numerical aperture and minimal aberrations, which amplify the fluorescence signal from NV centers. This approach is scalable and compatible with existing diamond-based quantum platforms, offering transformative potential for applications in quantum information processing, magnetic field sensing, and nanoscale imaging. The method sets a new standard for integrating optical components with quantum defects, unlocking unprecedented sensitivity in NV-center-based technologies Picture adapted from Phys. Rev. Lett. 125, 193601.</p>