Results 51 to 60 of about 253 (181)

Laser-induced incandescence for soot diagnostics at high pressures

Applied Optics, 2003
The influence of pressure on laser-induced incandescence (LII) is investigated systematically in premixed, laminar sooting ethylene/air flames at 1-15 bar with wavelength-, laser fluence-, and time-resolved detection. In the investigated pressure range the LII signal decay rate is proportional to pressure.
Hofmann, Max, Bessler, Wolfgang G., Schulz, Christof, Jander, Helga   +3 more
openaire   +4 more sources

Cr3+‐Activated Tunable Near‐Infrared Mechanoluminescence Materials for Potential Water Pollutant Monitoring

Advanced Functional Materials, Volume 36, Issue 6, 19 January 2026.
Four kinds of magnetite type NIR‐ML materials are synthesized by high‐temperature solid‐state reaction method. The continuous spectral tuning from a sharp R line (698 nm) to a broadband range (650–1000 nm) is realized based on composite engineering, concentration engineering, and lattice engineering strategies.
Xuesong Wang, Yao Xiao, Puxian Xiong, Pan Zheng, Shengbing Xu, Wenzhao He, Haiqiang Fang, Pengzhe Wang, Jiayi Yu, Sheng Wu, Qi Qian   +10 more
wiley   +1 more source

Time-resolved measurements of black carbon light absorption enhancement in urban and near-urban locations of southern Ontario, Canada [PDF]

Atmospheric Chemistry and Physics, 2011
In this study a photoacoustic spectrometer (PA), a laser-induced incandescence instrument system (LII) and an Aerosol Mass Spectrometer were operated in parallel for in-situ measurements of black carbon (BC) light absorption enhancement.
T. W. Chan, J. R. Brook, G. J. Smallwood, G. Lu   +3 more
doaj   +1 more source

Review of Organic Persistent Phosphors: Classifications by Material Forms, Applications, and Mechanisms

Advanced Optical Materials, Volume 14, Issue 4, 27 January 2026.
Persistent luminescence (PersL), or afterglow, is the phenomenon of light emission that continues long after the excitation source is removed. This review systematically covers the historical development and major material forms of organic PersL materials, detailing their operating principles, mechanisms, and typical applications.
Cunjian Lin, Jumpei Ueda
wiley   +1 more source

Measurement of Thermal Accommodation Coefficients Using Laser-Induced Incandescence

ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 2, 2007
Laser-induced incandescence (LII) is used to measure the thermal accommodation coefficient between soot sampled from a well-characterized flame and various monatomic and polyatomic gases. These measurements show that the thermal accommodation coefficient between soot and monatomic gases increases with molecular mass due to the decreasing speed of ...
Daun, K. J., Mercier, P. H., Smallwood, G. J., Liu, F., Le Page, Y.   +4 more
openaire   +3 more sources

Boosting the Performance of Epitaxial Perovskite Microstructures by Surface Passivation

Advanced Optical Materials, Volume 14, Issue 1, 9 January 2026.
Surface passivation is applied to epitaxial perovskite structures. Improvements are obtained in respect to luminescence intensity and decay time, as well in respect to photodetection and lasing. Highlight results include photoluminescence transients that are limited only by carrier diffusion and a record low laser threshold for microcrystal‐based ...
Shuyu Zhou, Viktor Rehm, Roman Grizfeld, Zihao Liu, Yufei Han, Tomáš Hrbek, Iva Matolínová, Jędrzej Korczak, Andrzej Szczerbakow, Tomasz Story, Mordechai Kot, Maria A. Loi, Zijian Peng, Masato Sotome, Takashi Kondo, Karen Forberich, Larry Lüer, Christoph. J. Brabec, Julia Mergheim, Wolfgang Heiss   +19 more
wiley   +1 more source

Ultrafast Multiphoton Thermionic Photoemission from Graphite

Physical Review X, 2017
Electronic heating of cold crystal lattices in nonlinear multiphoton excitation can transiently alter their physical and chemical properties. In metals where free electron densities are high and the relative fraction of photoexcited hot electrons is low,
Shijing Tan, Adam Argondizzo, Cong Wang, Xuefeng Cui, Hrvoje Petek   +4 more
doaj   +1 more source

Techniques and Advances in Ultrafast Photography

Advanced Photonics Research, Volume 6, Issue 12, December 2025.
This review maps the fast‐growing field of ultrafast photography from early mechanical cameras to modern optical‐computational methods. It organizes techniques into four families (multishot passive/active; single‐shot passive/active), explains how they reach trillion‐frame‐per‐second speeds, compares capabilities and tradeoffs, and highlights ...
Chen Huang, Xin Zhang, Renjie Han, Jiaoyu Fan, Hui Jiang, Yiwen Zhang, Jinghua Yu, Jiamin Wang, Yi Chen, Junjie Sun, Fei Chen   +10 more
wiley   +1 more source

Unsupervised classification of absorbing aerosols detected by the Single Particle Soot Photometer [PDF]

Atmospheric Measurement Techniques
The Single Particle Soot Photometer (SP2) detects refractory aerosol particle mass on a single-particle basis via laser-induced incandescence (L-II). While the SP2 has traditionally been used to quantify black carbon aerosol mass in the atmosphere, the ...
A. Doshi, K. D. Lamb
doaj   +1 more source

Aircraft and ground measurements of dust aerosols over the west African coast in summer 2015 during ICE-D and AER-D [PDF]

Atmospheric Chemistry and Physics, 2018
During the summertime, dust from the Sahara can be efficiently transported westwards within the Saharan air layer (SAL). This can lead to high aerosol loadings being observed above a relatively clean marine boundary layer (MBL) in the tropical ...
D. Liu, J. W. Taylor, J. Crosier, N. Marsden, K. N. Bower, G. Lloyd, C. L. Ryder, J. K. Brooke, R. Cotton, F. Marenco, A. Blyth, Z. Cui, V. Estelles, M. Gallagher, H. Coe, T. W. Choularton   +15 more
doaj   +1 more source