Silicon Nanoantenna Mix Arrays for a Trifecta of Quantum Emitter Enhancements

Abstract

Dielectric nanostructures have demonstrated optical antenna effects due to Mie resonances. Preliminary investigations on dielectric nanoantennas have been carried out for a trifecta of enhancements, i.e., simultaneous enhancements in absorption, emission directionality and radiative decay rates of quantum emitters. However, these investigations are limited by fragile substrates or low Purcell factor, which is extremely important for exciting quantum emitters electrically. In this paper, we present a Si mix antenna array to achieve the trifecta enhancement of ~1200 fold with a Purcell factor of ~47. The antenna design incorporates ~10 nm gaps within which fluorescent molecules strongly absorb the pump laser energy through a resonant mode. In the emission process, the antenna array increases the radiative decay rates of the fluorescence molecules via Purcell effect and provides directional emission through a separate mode. This work could lead to novel CMOS compatible platforms for enhancing fluorescence for biological and chemical applications.

arXiv comment20 pages, 4 figures

References in corpus (8)

• Directional visible light scattering by silicon nanoparticles
• Magnetic light
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• Demonstration of zero optical backscattering from single nanoparticles
• Generalized Brewster-Kerker effect in dielectric metasurfaces
• An optical metamixer
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Cited by in corpus (4)

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• Schrodinger's Red Pixel by Quasi Bound-State-In-Continuum
• Tunable Mie Resonances in the Visible Spectrum