A generalized method for calculating plasmoelectric potential in non-Mie-resonant plasmonic systems

Area of Science:

• Optoelectronics
• Photochemistry
• Thermodynamics

Background:

• Plasmoelectric potential (PEP) is an optical thermodynamic phenomenon observed in plasmonic nanostructures since 2014.
• Existing theoretical models for PEP are limited to Mie-resonant nanostructures with specific substrates like gold on ITO.
• Previous methods may overestimate temperature increases in realistic experimental conditions.

Purpose of the Study:

• To develop a generalized computational method for quantifying PEP.
• To accurately determine plasmon-induced electron transfer efficiency between various metallic nanostructures and conductive substrates.
• To provide a robust approach for calculating PEP in diverse nanocavity systems.

Main Methods:

• Developed an equilibrium-thermodynamics computational method.
• Quantified electron transfer efficiency between non-Mie-resonant metallic nanostructures and conductive substrates.
• Evaluated plasmonic local heating effects under continuous-wave illumination (CWI).

Main Results:

• The new method accurately predicts steady-state temperatures with less than 2.5% relative error.
• It provides a more rigorous evaluation of temperature increases in plasmonic nanostructures and arrays.
• The method is applicable to various plasmonic-particle (array)-on-film nanocavities.

Conclusions:

• The proposed method offers a robust and accurate approach for quantifying PEP.
• It overcomes limitations of previous models, enabling broader applications in optoelectronics and photochemistry.
• This work advances the understanding and calculation of PEP in complex plasmonic systems.