Anticrossing of A Plasmonic Nanoresonator Mode and A Single Quantum Dot at Room Temperature.

ABSTRACT: Strong coupling between a single quantum emitter and a resonant plasmonic mode at room temperature is vital for quantum information processing and sensing. Beating dephasing in these systems by ultrafast energy transfer requires coupling single emitters to a plasmonic nanoresonator with ultrasmall mode volume and optimal spectral overlap. Typically, strong coupling is inferred from normal mode splittings in luminescence spectra, offering rough estimates of coupling strength. However, achieving a full anticrossing and characterizing uncoupled components in advance is challenging. Here, the oxygen-dependent blue-shift of CdSe/ZnS quantum dots, recorded at 33 ms time resolution, is leveraged to deterministically tune their transition energy across a scanning plasmonic slit resonator to yield

SUBMITTER: Friedrich D 

PROVIDER: S-EPMC12462928 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature