Surface Plasmon-Induced Hot Carriers: Generation, Detection, and Applications.

Area of Science:

• Plasmonics
• Materials Science
• Photocatalysis

Background:

• Surface plasmon decay in metal nanostructures generates energetic hot carriers.
• Hot carriers are key to energy conversion in optoelectronics and photocatalysis.
• Metal-semiconductor platforms enable detection and utilization of hot carrier flow.

Purpose of the Study:

• To elucidate the relationship between surface plasmons and hot carriers.
• To detail the role of hot carriers in catalytic reactions.
• To highlight recent advancements in hot carrier generation and application.

Main Methods:

• Experimental visualization of hot carrier flow using photoconductive atomic force microscopy.
• Theoretical analysis via finite-difference time-domain (FDTD) simulations.
• Fabrication and characterization of hybrid nanodiodes and heterostructures.

Main Results:

• Localized surface plasmon fields boost hot carrier generation.
• Plasmonic hot carriers enhance solar-to-electron conversion in hybrid nanodiodes.
• Hot carriers participate in and control photocatalytic reactions like water splitting.

Conclusions:

• Hot carriers are pivotal for efficient solar energy conversion and photocatalysis.
• Hybrid platforms integrating plasmonic nanostructures offer promising avenues for advanced optoelectronics and catalysis.
• Controlling hot carrier flow is essential for optimizing performance in these applications.