Resonant structure for improved directionality and extraction of single photons
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2024-11-25 |
| Journal | Journal of Physics Photonics |
| Authors | Sagar Chowdhury, Rituraj Rituraj, Srini Krishnamurthy, Vidya Praveen Bhallamudi |
| Citations | 1 |
Abstract
Section titled āAbstractāAbstract Fluorescent atomic defects, particularly in dielectric materials such as diamond, are promising for several emerging quantum applications. However, efficient light extraction, directional emission, and narrow spectral emission are key challenges. We have designed a dielectric metasurface exploiting Mie-resonance and Kerker conditions to address these issues. Our designed diamond metasurface, tailored for nitrogen-vacancy (NV) defect centers in diamond, predicts up to 500Ć improvement in the collection of 637 nm (zero phonon line) photons over that from the bare diamond. Our design achieves highly directional emission, predominantly emitting in a <mml:math xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā overflow=āscrollā> <mml:mrow> <mml:msup> <mml:mn>20</mml:mn> <mml:mo>ā</mml:mo> </mml:msup> </mml:mrow> </mml:math> lobe in the forward direction. This makes the light collection more efficient, including fiber-based collection. The predicted results are stable against the position of the emitter placed in the metaelement, thus alleviating the challenging fabrication requirement of precise positioning of the defect center. Equally importantly, our design approach can be applied to enhance single photon emission also from other defects such as SiV, other materials such as hBN, and other sources such as quantum dots.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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