DataVXACS NanoPaper
journal article·2024-11-19

Coherent Acoustic Phonons in Plasmonic Nanoparticles: Elastic Properties and Dissipation at Low Temperatures

Hilario D. Boggiano, Thomas Possmayer, Luis Morguet, Lin Nan, Luca Sortino, Stefan A. Maier, Emiliano Cortés, Gustavo Grinblat, Andrea V. Bragas, Leonardo de S. Menezes

ACS Nano· Volume 18· Issue 46
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Source abstract

Abstract

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.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Mechanical and Optical Resonators · Thermal properties of materials · Thermal Radiation and Cooling Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, 1428 Buenos Aires, Argentina

Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 München, Germany

School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia

Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom

CONICET - Universidad de Buenos Aires, Instituto de Física de Buenos Aires (IFIBA), 1428 Buenos Aires, Argentina

Departamento de Física, Universidade Federal de Pernambuco, Recife PE 50670-901, Brazil

Funding

Consejo Nacional de Investigaciones Cient?ficas y T?cnicas · Deutsche Forschungsgemeinschaft · Center for NanoScience, Ludwig-Maximilians-Universit?t M?nchen · Bayerisches Staatsministerium f?r Wissenschaft und Kunst · Universidad de Buenos Aires · Alexander von Humboldt-Stiftung · Solar Technologies go Hybrid · Fondo para la Investigaci?n Cient?fica y Tecnol?gica

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