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We present a non-Hermitian formulation of the polaritonic structure of azobenzene strongly coupled to a photonic mode that explicitly accounts for the fleeting nature of the photon-molecule interaction. This formalism reveals that the polaritonic non-adiabatic couplings that facilitate cis-trans isomerization can be dramatically modified by photonic dissipation. We perform Fewest-Switches Surface Hopping dynamics on the surfaces that derive from our non-Hermitian formalism and find that the polaritonic isomerization yields are strongly suppressed for moderate to large photon dissipation rates. These findings highlight the important role that the finitelifetime of photonic degrees of freedom play in polaritonic chemistry. File list (2) download file view on ChemRxiv Polaritonic_Chemistry_v2_main.pdf (1.99 MiB) download file view on ChemRxiv Polaritonic_Chemistry_v2_SI.pdf (479.09 KiB)

Two-dimensional boron is promising as a tunable monolayer metal for nano-optoelectronics. We study the optoelectronic properties of two likely allotropes of two-dimensional boron, β 12 and δ 6 , using first-principles density functional theory and many-body perturbation theory. We find that both systems are anisotropic metals, with strong energy-and thickness-dependent optical transparency and a weak (<1%) absorbance in the visible range. Additionally, using state-of-the-art methods for the description of the electron−phonon and electron− electron interactions, we show that the electrical conductivity is limited by electron−phonon interactions. Our results indicate that both structures are suitable as a transparent electrode.

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