%0 Journal Article %1 friedrich2023anticrossing %A Friedrich, Daniel %A Qin, Jin %A Schurr, Benedikt %A Tufarelli, Tommaso %A Groß, Heiko %A Hecht, Bert %D 2023 %K anticrossing experiment myown nano-optics nanoresonator near-field plasmon %T Anticrossing of a plasmonic nanoresonator mode and a single quantum dot at room temperature %U http://arxiv.org/abs/2305.06909 %X Room-temperature strong coupling of a single quantum emitter and a single resonant plasmonic mode is a key resource for quantum information processing and quantum sensing at ambient conditions. To beat dephasing, ultrafast energy transfer is achieved by coupling single emitters to a plasmonic nanoresonator with an extremely small mode volume and optimal spectral overlap. Typically, normal mode splittings in luminescence spectra of single-emitter strongly-coupled systems are provided as evidence for strong coupling and to obtain rough estimates of the light-matter coupling strength g. However, a complete anticrossing of a single emitter and a cavity mode as well as the characterization of the uncoupled constituents is usually hard to achieve. Here, we exploit the light-induced oxygen-dependent blue-shift of individual CdSe/ZnS semiconductor quantum dots to tune their transition energy across the resonance of a scanning plasmonic slit resonator after characterizing both single emitter and nano resonator in their uncoupled states. Our results provide clear proof of single-emitter strong light-matter coupling at ambient condition as well as a value for the Rabi splitting at zero detuning 100 meV, consistent with modeling, thereby opening the path towards plexitonic devices that exploit single-photon nonlinearities at ambient conditions.

@article{friedrich2023anticrossing, abstract = {Room-temperature strong coupling of a single quantum emitter and a single resonant plasmonic mode is a key resource for quantum information processing and quantum sensing at ambient conditions. To beat dephasing, ultrafast energy transfer is achieved by coupling single emitters to a plasmonic nanoresonator with an extremely small mode volume and optimal spectral overlap. Typically, normal mode splittings in luminescence spectra of single-emitter strongly-coupled systems are provided as evidence for strong coupling and to obtain rough estimates of the light-matter coupling strength g. However, a complete anticrossing of a single emitter and a cavity mode as well as the characterization of the uncoupled constituents is usually hard to achieve. Here, we exploit the light-induced oxygen-dependent blue-shift of individual CdSe/ZnS semiconductor quantum dots to tune their transition energy across the resonance of a scanning plasmonic slit resonator after characterizing both single emitter and nano resonator in their uncoupled states. Our results provide clear proof of single-emitter strong light-matter coupling at ambient condition as well as a value for the Rabi splitting at zero detuning 100 meV, consistent with modeling, thereby opening the path towards plexitonic devices that exploit single-photon nonlinearities at ambient conditions.}, added-at = {2023-07-04T18:07:12.000+0200}, author = {Friedrich, Daniel and Qin, Jin and Schurr, Benedikt and Tufarelli, Tommaso and Groß, Heiko and Hecht, Bert}, biburl = {https://www.bibsonomy.org/bibtex/2498ee7077a39df323e9db0e5ce4b5ddc/ep5optics}, interhash = {bc1dff6f30c3f51b3456b38889b6fa60}, intrahash = {498ee7077a39df323e9db0e5ce4b5ddc}, keywords = {anticrossing experiment myown nano-optics nanoresonator near-field plasmon}, note = {cite arxiv:2305.06909}, timestamp = {2023-07-04T18:07:12.000+0200}, title = {Anticrossing of a plasmonic nanoresonator mode and a single quantum dot at room temperature}, url = {http://arxiv.org/abs/2305.06909}, year = 2023 }