Molecular photodissociation enabled by ultrafast plasmon decay
- URL: http://arxiv.org/abs/2011.08705v1
- Date: Tue, 17 Nov 2020 15:28:50 GMT
- Title: Molecular photodissociation enabled by ultrafast plasmon decay
- Authors: Jos\'e Torres-S\'anchez, Johannes Feist
- Abstract summary: We propose a strategy for enabling photodissociation of a normally photostable molecule through coupling to a nanoparticles plasmon.
The large possible coupling on the single-molecule level combined with the highly lossy nature of plasmonic modes, with lifetimes on the order of femtoseconds, opens an ultrafast decay channel for the molecule.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: We propose a strategy for enabling photodissociation of a normally
photostable molecule through coupling to a nanoparticle plasmon. The large
possible coupling on the single-molecule level combined with the highly lossy
nature of plasmonic modes, with lifetimes on the order of femtoseconds, opens
an ultrafast decay channel for the molecule. For plasmon mode frequencies below
the vertical photoexcitation energy of the molecule, the difference between
excitation and emission energy is converted into vibrational energy on the
molecular ground state in a Raman-like process. Under the correct conditions,
this energy can be high enough to enable efficient photodissociation on the
electronic ground state. We demonstrate the concept using numerical simulations
of the Lindblad master equation for the hydrogen molecule in the vicinity of an
aluminum nanoparticle, and explore the photodissociation efficiency as a
function of various system parameters.
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