There has been a marked revival of interest in brillouin light scattering spectroscopy/microscopy over the last decade in regards to applications related to all optically studying the mechanical problems associated with systems of biological and medical interest. This revival has been driven by advancements in spectrometer design, together with mounting evidence of the critical role that mechanical properties can play in biological processes as well as the onset of diverse diseases. This feature issue contains a series of papers spanning some of the latest developments in the field of Brillouin light scattering spectroscopy and microscopy as applied to systems of biomedical interest.
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| http://dx.doi.org/10.1364/BOE.10.002670 | DOI Listing |
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Characterization of the Microstructure of SrBaNbO Thin Films by Brillouin Light Scattering.
Nanomaterials (Basel)
December 2024
Department of Physical Electronics and Technology, St. Petersburg State Electrotechnical University "LETI", 197376 St. Petersburg, Russia.
Article Synopsis
- Strontium-barium niobate (SrBaNbO) films are promising for microwave applications due to their high dielectric nonlinearity and low losses.
- The films were synthesized on sapphire substrates using magnetron sputtering, and their structural features were analyzed through various methods, focusing on Brillouin light scattering.
- Brillouin light scattering proved to be an effective nondestructive technique for examining the films' structures, allowing precise determination of their thickness and unique properties influenced by acoustic wave scattering.
Optoacoustic lenses for lateral sub-optical resolution elasticity imaging.
Photoacoustics
February 2025
Optics and Photonics Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, Nottinghamshire, United Kingdom.
In this paper, we demonstrate for the first time the focusing of gigahertz coherent phonon pulses propagating in water using picosecond ultrasonics and Brillouin light scattering. We achieve this by using planar Fresnel zone plate and concave lenses with different focal lengths. Pump light illuminating the optoacoustic lens generates a focusing acoustic field, and Brillouin scattered probe light allows the acoustic field to be continuously monitored over time.
View Article and Find Full Text PDFTwo-dimensional flat-band solitons in superhoneycomb lattices.
Nanophotonics
September 2024
Departamento de Física and Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, Lisboa 1749-016, Portugal.
Flat-band periodic materials are characterized by a linear spectrum containing at least one band where the propagation constant remains nearly constant irrespective of the Bloch momentum across the Brillouin zone. These materials provide a unique platform for investigating phenomena related to light localization. Meantime, the interaction between flat-band physics and nonlinearity in continuous systems remains largely unexplored, particularly in continuous systems where the band flatness deviates slightly from zero, in contrast to simplified discrete systems with exactly flat bands.
View Article and Find Full Text PDFMultiscale Elasticity of Epoxy Networks by Rheology and Brillouin Light Spectroscopy.
J Phys Chem B
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Institute of Electronic Structure and Laser, FORTH, Heraklion 70013, Greece.
The response of soft materials to an imposed oscillatory stress is typically frequency dependent, with the most utilized frequency range falling in the range of 10-10 rad/s. In contrast to most conventional contact techniques for measuring material elasticity, like tensile or shear rheology and atomic force microscopy, or invasive techniques using probes, such as microrheology, Brillouin light spectroscopy (BLS) offers an optical, noncontact, label-free, submicron resolution and three-dimensional (3D) mapping approach to access the mechanical moduli at GHz frequencies. Currently, the correlation between the experimental viscoelastic (at lower frequencies) and elastic (at higher frequencies) moduli has fundamental and practical relevance, but remains unclear.
View Article and Find Full Text PDFOptoacoustic Entanglement in a Continuous Brillouin-Active Solid State System.
Phys Rev Lett
November 2024
Max Planck Institute for the Science of Light, Staudtstraße 2, D-91058 Erlangen, Germany.
Entanglement in hybrid quantum systems comprised of fundamentally different degrees of freedom, such as light and mechanics, is of interest for a wide range of applications in quantum technologies. Here, we propose to engineer bipartite entanglement between traveling acoustic phonons in a Brillouin active solid state system and the accompanying light wave. The effect is achieved by applying optical pump pulses to state-of-the-art waveguides, exciting a Brillouin Stokes process.
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