Coherent Acoustic Phonons in Plasmonic Nanoparticles: Elastic Properties and Dissipation at Low Temperatures
We studied the frequency and quality factor of mechanical plasmonic nanoresonators as a function of temperature, ranging from ambient to 4 K. Our investigation focused on individual gold nanorods and nanodisks of various sizes. We observed that oscillation frequencies increase linearly as temperature decreases until saturation is reached at cryogenic temperatures. This behavior is explained by the temperature dependence of the elastic modulus, with a Debye temperature compatible with reported bulk values for gold. To describe the behavior of the quality factor, we developed a model considering the nanostructures as anelastic solids, identifying a dissipation peak around 150 K due to a thermally activated process, likely of the Niblett-Wilks mechanism type. Importantly, our findings suggest that external dissipation factors are more critical to improving quality factors than internal friction, which can be increased by modifying the nanoresonator's environment. Our results enable the future design of structures with high vibration frequencies and quality factors by effectively controlling external losses.
Authors
- Gustavo Grinblat (ORCID: https://orcid.org/0000-0002-1637-9524)
- Andrea V. Bragas (ORCID: https://orcid.org/0000-0003-4482-9059)
- Stefan Alexander Maier (ORCID: https://orcid.org/0000-0001-9704-7902)
- Luca Sortino (ORCID: https://orcid.org/0000-0002-6284-6955)
- Emiliano Cortés (ORCID: https://orcid.org/0000-0001-8248-4165)
- Thomas Possmayer (ORCID: https://orcid.org/0009-0004-3618-3539)
- Hilario D. Boggiano (ORCID: https://orcid.org/0000-0001-5723-3719)
- Nan Lin (ORCID: https://orcid.org/0000-0002-8680-2455)
- Leonardo de S. Menezes (ORCID: https://orcid.org/0000-0002-8654-1953)
- Luis Morguet
Institutions
- Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
- Universidad de Buenos Aires (AR)
- Universidade Federal de Pernambuco (BR)
- Nanosystems Initiative Munich (DE)
- Instituto de Física de Buenos Aires (AR)
- Imperial College London (GB)
- Fundación Ciencias Exactas y Naturales (AR)
- Monash University (AU)
- Ludwig-Maximilians-Universität München (DE)
Publication Details
- Journal
- ACS Nano
- Published
- 2024-11-07
- DOI
- https://doi.org/10.1021/acsnano.4c09193
- Citations
- 5
- Primary Topic
- Mechanical and Optical Resonators
- Type
- article
- Field-Weighted Citation Impact
- 1.69
Funders
- Alexander von Humboldt-Stiftung
- Solar Technologies go Hybrid
- Deutsche Forschungsgemeinschaft
- Consejo Nacional de Investigaciones Científicas y Técnicas
- Universidad de Buenos Aires
- Bayerisches Staatsministerium für Wissenschaft und Kunst
- Center for NanoScience, Ludwig-Maximilians-Universität München
- Fondo para la Investigación Científica y Tecnológica