Tobias Helbig

All Publications

• Room-temperature quantum nanoplasmonic coherent perfect absorption NATURE COMMUNICATIONS Lai, Y., Clarke, D. A., Grimm, P., Devi, A., Wigger, D., Helbig, T., Hofmann, T., Thomale, R., Huang, J., Hecht, B., Hess, O. 2024; 15 (1): 6324

  Abstract

  Light-matter superposition states obtained via strong coupling play a decisive role in quantum information processing, but the deleterious effects of material dissipation and environment-induced decoherence inevitably destroy coherent light-matter polaritons over time. Here, we propose the use of coherent perfect absorption under near-field driving to prepare and protect the polaritonic states of a single quantum emitter interacting with a plasmonic nanocavity at room temperature. Our scheme of quantum nanoplasmonic coherent perfect absorption leverages an inherent frequency specificity to selectively initialize the coupled system in a chosen plasmon-emitter dressed state, while the coherent, unidirectional and non-perturbing near-field energy transfer from a proximal plasmonic waveguide can in principle render the dressed state robust against dynamic dissipation under ambient conditions. Our study establishes a previously unexplored paradigm for quantum state preparation and coherence preservation in plasmonic cavity quantum electrodynamics, offering compelling prospects for elevating quantum nanophotonic technologies to ambient temperatures.

  View details for DOI 10.1038/s41467-024-50574-9

  View details for Web of Science ID 001279103300004

  View details for PubMedID 39060227

  View details for PubMedCentralID PMC11282272