Optoacoustic response of a single submicronic gold particle revealed by the picosecond ultrasonics technique
| Autor: | Bertrand Audoin, Serge Ravaine, Clément Rossignol, Yannick Guillet, Gaëtan Calbris |
|---|---|
| Přispěvatelé: | Laboratoire de Mécanique Physique (LMP), Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1, Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1, Centre de physique moléculaire optique et hertzienne (CPMOH), ANR-06-NANO-0020,ETHNA,Etude de l'amplification de la Conduction Thermique dans des Réseaux de Nanoparticules(2006) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Physics::Optics 02 engineering and technology 01 natural sciences Signal [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] Optics 0103 physical sciences high-speed optical techniques reflectivity [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] Thin film 010306 general physics Photoacoustic effect 78.20.hb 62.65.+k 78.47.J- 78.20.Ci refractive index business.industry gold 021001 nanoscience & nanotechnology thin films Femtosecond Particle Picosecond ultrasonics sense organs Transient (oscillation) 0210 nano-technology business silicon compounds Refractive index photoacoustic effect |
| Zdroj: | Applied Physics Letters Applied Physics Letters, American Institute of Physics, 2009, 95 (6), pp.061909 (1-3). ⟨10.1063/1.3205472⟩ |
| ISSN: | 0003-6951 |
| Popis: | 3 pages; International audience; The optoacoustic response of a single submicron (430 nm) gold particle embedded in a silica thin film is experimentally revealed by femtosecond pump-probe experiments. A semianalytical model is developed to calculate the transient reflectivity accounting for optical index changes in both media and for particle and film surface displacements. The displacement of the particle-film interface turns out to be the major contribution to the measured signal. The amplitude of the acoustical component of the transient reflectivity is modulated by the depth at which the particle is buried in the film. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|