Laser intensity measurements by chemical actinometry. A photooxygenation actinometer

1976 ◽  
Vol 80 (20) ◽  
pp. 2248-2253 ◽  
Author(s):  
J. N. Demas ◽  
R. P. McBride ◽  
E. W. Harris
Keyword(s):  
Laser Intensity ◽  
Intensity Measurements

The Mechanical Response of Aligned Carbon Nanotube Mats via Transmitted Laser Intensity Measurements

2008 ◽  
Author(s):  
Christian Deck ◽  
Chinung Ni ◽  
Kenneth Vecchio ◽  
Prabhakar Bandaru
Keyword(s):  
Carbon Nanotube ◽  
Mechanical Response ◽  
Laser Intensity ◽  
Intensity Measurements

Thickness and composition determinations from T.E.M. specimens using both x-ray and backscattered electron data

1984 ◽  
Vol 42 ◽  
pp. 576-577
Author(s):  
M.D. Ball ◽  
H. Lagace ◽  
M.C. Thornton
Keyword(s):  
Electron Microscope ◽  
Atomic Number ◽  
Transmission Electron Microscope ◽  
Convenient Method ◽  
Flow Chart ◽  
X Ray ◽  
Intensity Measurements ◽  
Transmission Electron ◽  
Electron Intensity ◽  
Backscattered Electron

The backscattered electron coefficient η for transmission electron microscope specimens depends on both the atomic number Z and the thickness t. Hence for specimens of known atomic number, the thickness can be determined from backscattered electron coefficient measurements. This work describes a simple and convenient method of estimating the thickness and the corrected composition of areas of uncertain atomic number by combining x-ray microanalysis and backscattered electron intensity measurements.The method is best described in terms of the flow chart shown In Figure 1. Having selected a feature of interest, x-ray microanalysis data is recorded and used to estimate the composition. At this stage thickness corrections for absorption and fluorescence are not performed.

Effects of the Laser Intensity Profile on Ignition of Hydrogen-Air Mixture

2021 ◽  
Author(s):  
Albina Tropina ◽  
Sagar Pokharel ◽  
Mikhail N. Shneider
Keyword(s):  
Laser Intensity ◽  
Intensity Profile

scholarly journals Bright betatron radiation from direct-laser-accelerated electrons at moderate relativistic laser intensity

2021 ◽  
Vol 6 (4) ◽  
pp. 048401
Author(s):  
O. N. Rosmej ◽  
X. F. Shen ◽  
A. Pukhov ◽  
L. Antonelli ◽  
F. Barbato ◽  
...  
Keyword(s):  
Laser Intensity ◽  
Accelerated Electrons ◽  
Direct Laser

scholarly journals Nonlinear Absorption and Ultrafast Dynamics of Ag Nanoparticle

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 233
Author(s):  
Jijuan Jiang ◽  
Jun Wang ◽  
Tong Wu ◽  
Yachen Gao
Keyword(s):  
Silver Nanoparticles ◽  
Time Constant ◽  
Laser Intensity ◽  
Photon Absorption ◽  
Saturable Absorption ◽  
Phonon Coupling ◽  
Saturated Absorption ◽  
Coupling Process ◽  
Two Photon Absorption ◽  
Two Photon

Resonant nonlinear optical absorption of silver nanoparticles was studied experimentally via open aperture Z-scan using 130 fs, 400 nm laser pulses. Experimental results show that, at low laser intensity, silver nanoparticles can exhibit saturated absorption. While at high laser intensity, it shows reverse saturated absorption. The saturable absorption is explained in terms of ground state plasmon bleaching, while the reverse saturable absorption is believed to be from two-photon absorption. Saturable optical intensity and two-photon absorption coefficient were obtained to be 1.3×1010 W/m2 and 3.3×10−10 m/W, respectively. The energy relaxation process of Ag nanoparticles after laser excitation was studied via pump-probe technique at 400 nm. Experimental results demonstrated that energy relaxation included electron-phonon coupling process with time constant τ1=(713±50) fs, and phonon-phonon coupling process with time constant τ2=(25.2±3) ps, respectively.

Thermally activated delayed fluorescent photosensitizer for photodynamic therapy of oral squamous cell carcinoma under low laser intensity

2021 ◽  
Author(s):  
Shiqi Hu ◽  
Bin Huang ◽  
Yumei Pu ◽  
Chengwan Xia ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Photodynamic Therapy ◽  
Oral Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Laser Intensity ◽  
Thermally Activated

In this report, a new Thermally activated delayed fluorescent(TADF) molecule [2-(4-triphenylvinyl-phenyl)-anthraquinone (TPE-AQ)] was synthesized. This nanomaterial has satisfactory photostability. In vitro, it was indicated that these TADF nanoparticles (NPs) were...

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