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arXiv · 2412.20199

Continuous and Reversible Electrical Tuning of Fluorescent Decay Rate via Fano Resonance

Emre Ozan Polat·Zafer Artvin·Yusuf Şaki·Alpan Bek·Ramazan Sahin
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Abstract

We demonstrate that the decay rates of a fluorescent molecule can be controlled by electrically shifting a transparency introduced by a Fano resonance. An auxiliary quantum object (QO), located at the hotspot of a plasmonic nanoparticle, suppresses plasmonic excitation at its level spacing {\omega}_QO. As a result, the local density of states (LDOS) associated with the plasmonic spectrum is also suppressed at {\omega}={\omega}_QO. By shifting {\omega}_QO via an applied voltage, we continuously tune the radiative and nonradiative decay rates of the fluorescent molecule by up to two orders of magnitude. This mechanism offers a valuable tool for integrated quantum technologies, enabling on-demand entanglement and single-photon sources, voltage-controlled quantum gate operations, and electrical control of superradiant-like phase transitions. The approach also holds promise for applications in super-resolution microscopy and surface-enhanced Raman spectroscopy (SERS).

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Emre Ozan Polat, Zafer Artvin, Yusuf Şaki, Alpan Bek, Ramazan Sahin. 2024-12-28. Continuous and Reversible Electrical Tuning of Fluorescent Decay Rate via Fano Resonance. https://doi.org/10.1088/1361-6528/ae5cac

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