Results 131 to 140 of about 779 (171)

Lightweight sparse optoacoustic image reconstruction via an attention-driven multi-scale wavelet network. [PDF]

Photoacoustics
Zhao X, Hu S, Yang Q, Zhang Z, Guo Q, Niu C.   +5 more
europepmc   +1 more source

Optimizing pump–probe reflectivity measurements of ultrafast photoacoustics with modulated asynchronous optical sampling

Review of Scientific Instruments, 2023
Time-resolved optical pump–probe experiments enable the study of complex light–matter interactions on ultrafast timescales, provided that they reach sufficient sensitivity. For instance, with pump-induced ultrafast photoacoustics, probing the typically small changes in optical properties requires a high signal-to-noise ratio.
Matthias Christiaan Velsink, Maksym Illienko, Stefan Witte   +2 more
exaly   +5 more sources

High-resolution microscopy through optically opaque media using ultrafast photoacoustics

Optics Express, 2020
We present a high-resolution microscope capable of imaging buried structures through optically opaque materials with micrometer transverse resolution and a nanometer-scale depth sensitivity. The ability to image through such materials is made possible by the use of laser ultrasonic techniques, where an ultrafast laser pulse launches acoustic waves ...
Hao Zhang, Stephen Edward, Vanessa Verrina   +2 more
exaly   +4 more sources

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Ultrafast Photoacoustic Nanometrology of InAs Nanowires Mechanical Properties

The Journal of Physical Chemistry C, 2022
InAs nanowires are emerging as go-to materials in a variety of applications ranging from optoelectronics to nanoelectronics, yet a consensus on their mechanical properties is still lacking. The mechanical properties of wurtzite InAs nanowires are here investigated via a multitechnique approach, exploiting electron microscopies, ultrafast photoacoustics,
Marco Gandolfi, Simone Peli, Michele Diego, Stefano Danesi, Claudio Giannetti, Ivano Alessandri, Valentina Zannier, Valeria Demontis, Mirko Rocci, Fabio Beltram, Lucia Sorba, Stefano Roddaro, Francesco Rossella, Francesco Banfi   +13 more
openaire   +3 more sources

Optical‐resolution photoacoustic microscopy with ultrafast dual‐wavelength excitation

Journal of Biophotonics, 2020
AbstractFast functional and molecular photoacoustic microscopy requires pulsed laser excitations at multiple wavelengths with enough pulse energy and short wavelength‐switching time. Recent development of stimulated Raman scattering in optical fiber offers a low‐cost laser source for multiwavelength photoacoustic imaging.
Yingying Zhou, Siyi Liang, Mingsheng Li, Chengbo Liu, Puxiang Lai, Lidai Wang   +5 more
openaire   +3 more sources

Ultrafast optical resolution photoacoustic microscopy in vivo

Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019
Photoacoustic Imaging (PAI) is an emerging non-ionizing and non-invasive biomedical imaging method in the past few years. PAI can effectively obtain both structural and functional information of bio-tissues, providing an important method for studying the morphological structure and physiological characteristics of bio-tissues, especially suitable for ...
Jian Zeng, Wei Zhi Qi, Tian Jin, Lei Xi
openaire   +1 more source

Photothermal and photoacoustic imaging by ultrafast optical sampling

The Journal of the Acoustical Society of America, 2008
We describe a new ultrafast imaging technique based on the use of two new generation Ytterbium lasers emitting at 1030 nm at 50 MHz repletion rate. Ultrafast acquisition is achieved by slightly shifting the repetition rate of the "pump" and the "probe" beams.
Stefan Dilhaire, Jean-Michel Rampnoux, Gilles Pernot, Gaetan Calbris, Stephane Grauby, Clément Rossignol, Sebastien Ermeneux, Eric Mottay   +7 more
openaire   +1 more source

Sensitive Detection of Ultrafast Photoacoustics Using Modulated Asynchronous Optical Sampling

2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2023
Matthijs Velsink, Maksym Illienko, Prerna Sudera, Stefan Witte   +3 more
exaly   +2 more sources

Ultrafast photoacoustic imaging with improved elevational focusing

SPIE Proceedings, 2011
Conventional photoacoustic imaging system has limited temporal resolution and hence prohibits the applications in areas such as real-time 3D imaging. In this study, an ultrafast photoacoustic imaging system with its frame rate up to 2,000Hz is demonstrated. An ultrasound transducer with plane wave excitation and a high pulse repetition rate laser are
Yu-Hsin Wang, Pai-Chi Li
openaire   +1 more source

Ultrafast photothermal and photoacoustic measurement of solid/liquid interfaces

The Journal of the Acoustical Society of America, 1996
Ultrafast photothermal (PT) and photoacoustic (PA) investigation of a metal–solution interface was performed by using subpicosecond time-resolved transient reflectivity (TR) measurement. A polycrystalline platinum film (thickness 30 nm) vapor-deposited on a glass substrate and a polycrystalline platinum disk were investigated in air and in a variety of
Akira Harata, Akihide Hibara, Tsuguo Sawada   +2 more
openaire   +1 more source