analiza aiqbench
This theoretical study demonstrates how hyperbolic nanocavities in hexagonal boron nitride can achieve single-molecule vibrational strong coupling, enabling precise control over molecular dynamics via confined phonon polaritons. The work advances fundamental quantum optics by bridging the gap between ensemble-level interactions and single-molecule regimes, offering new pathways for manipulating chemical reactivity at the nanoscale.
Hyperbolic Nanocavities for Single-Molecule Vibrational Strong Coupling
arXiv:2611.06240v1 Announce Type: cross Abstract: Hyperbolic phonon polaritons (HPhPs) in low-loss anisotropic materials such as hexagonal boron nitride (hBN) provide extreme sub-diffractional field confinement in the mid-infrared, making them attractive for enhancing the interaction of light with molecular vibrations. Collective vibrational strong coupling between molecular ensembles and HPhPs has already been demonstrated in extended slabs. Reaching this regime with a single molecule, however, remains a major challenge, and would provide a platform for investigating how vacuum electromagnetic fields influence molecular dynamics and chemical reactivity. Here, we show theoretically that single-molecule vibrational strong coupling can be reached in hBN nanocavities that laterally confine HPhPs within a finite volume. Combining full-wave electromagnetic simulations with the few-mode quantization approach, we find that these nanocavities support a rich set of asymmetric resonances that strongly enhance the local spectral density, with frequencies that follow from simple HPhP ray trajectories and can be tuned through the cavity aspect ratio. We identify resonances with quality factors of about $600$ and effective mode volumes of $|V_{\mathrm{eff}}| \sim 10^{-7}\lambda^{3}$, sufficient for single-molecule strong coupling with vibrational transitions with dipole moments on the order of $1\,\mathrm{D}$. These results establish hyperbolic nanocavities as a promising platform for single-molecule vibrational strong coupling and open new routes toward the local control of vibrational dynamics and molecular energy flow.
Abstract:Hyperbolic phonon polaritons (HPhPs) in low-loss anisotropic materials such as hexagonal boron nitride (hBN) provide extreme sub-diffractional field confinement in the mid-infrared, making them attractive for enhancing the interaction of light with molecular vibrations. Collective vibrational strong coupling between molecular ensembles and HPhPs has already been demonstrated in extended slabs. Reaching this regime with a single molecule, however, remains a major challenge, and would provide a platform for investigating how vacuum electromagnetic fields influence molecular dynamics and chemical reactivity. Here, we show theoretically that single-molecule vibrational strong coupling can be reached in hBN nanocavities that laterally confine HPhPs within a finite volume. Combining full-wave electromagnetic simulations with the few-mode quantization approach, we find that these nanocavities support a rich set of asymmetric resonances that strongly enhance the local spectral density, with frequencies that follow from simple HPhP ray trajectories and can be tuned through the cavity aspect ratio. We identify resonances with quality factors of about $600$ and effective mode volumes of $|V_{\mathrm{eff}}| \sim 10^{-7}\lambda^{3}$, sufficient for single-molecule strong coupling with vibrational transitions with dipole moments on the order of $1\,\mathrm{D}$. These results establish hyperbolic nanocavities as a promising platform for single-molecule vibrational strong coupling and open new routes toward the local control of vibrational dynamics and molecular energy flow.
Optics (physics.optics); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph)
arXiv:2611.06240 [physics.optics]
(or arXiv:2611.06240v1 [physics.optics] for this version)
https://doi.org/10.48550/arXiv.2611.06240 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.
Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.
Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.
Text integral sub licența deschisă a publicației · 311 cuvinte