# Photoinduced surface plasmon control of ultrafast melting modes in Au nanorods

Source: [Photoinduced surface plasmon control of ultrafast melting modes in Au nanorods](<https://www.sota2.com/research/paper/68fa48071e209131ce92c8c1>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T06:37:36.684Z

Authors: Eunyoung Park, Chulho Jung, Junha Hwang, Jaeyong Shin, Sung Yun Lee, Heemin Lee, Seung Phil Heo, Daewoong Nam, Sangsoo Kim, Min Seok Kim, Kyung Sook Kim, In Tae Eom, Do Young Noh, Changyong Song

Published: 2024-09-24T08:50:41.000Z

## Abstract

Photoinduced ultrafast phenomena in materials exhibiting nonequilibrium behavior can lead to the emergence of exotic phases beyond the limits of thermodynamics, presenting opportunities for femtosecond photoexcitation. Despite extensive research, the ability to actively control quantum materials remains elusive owing to the lack of clear evidence demonstrating the explicit control of phase-changing kinetics through light-matter interactions. To address this drawback, we leveraged single-pulse time-resolved X-ray imaging of Au nanorods undergoing photoinduced melting to showcase control over the solid-to-liquid transition process through the use of localized surface plasmons. Our study uncovers transverse or longitudinal melting processes accompanied by characteristic oscillatory distortions at different laser intensities. Numerical simulations confirm that the localized surface plasmons, excited by polarized laser fields, dictate the melting modes through anharmonic lattice deformations. These results provide direct evidence of photoinduced surface plasmon-mediated ultrafast control of matter, establishing a foundation for the customization of material kinetics using femtosecond laser fields.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2409.15877>)

[PDF](<https://arxiv.org/pdf/2409.15877.pdf>)