Probe beam size effect on the measurement of the distance between the probe beam and the sample in photothermal deflection

2006 ◽  
Vol 31 (1) ◽  
pp. 44 ◽  
Author(s):  
Jurandir H. Rohling ◽  
Jun Shen ◽  
Jianqin Zhou ◽  
Caikang Elton Gu
Keyword(s):  
Size Effect ◽  
Probe Beam ◽  
Beam Size ◽  
Photothermal Deflection

Probe beam size effects in photothermal deflection experiments

1988 ◽  
Vol 64 (1) ◽  
pp. 1-5 ◽  
Author(s):  
E. Legal Lasalle ◽  
F. Lepoutre ◽  
J. P. Roger
Keyword(s):  
Probe Beam ◽  
Size Effects ◽  
Beam Size ◽  
Photothermal Deflection

Investigation on beam-size effect on sub-picosecond LIDT of dielectric oxide coatings

2021 ◽  
Author(s):  
Marek Stehlik ◽  
Frank Wagner ◽  
Janis Zideluns ◽  
Fabien Lemarchand ◽  
Julien Lumeau ◽  
...  
Keyword(s):  
Size Effect ◽  
Beam Size ◽  
Oxide Coatings

Photothermal beam-deflection imaging of vertical interfaces in solids

1986 ◽  
Vol 64 (9) ◽  
pp. 1265-1268 ◽  
Author(s):  
F. Alan McDonald ◽  
Grover C. Wetsel Jr. ◽  
Georges E. Jamieson
Keyword(s):  
Probe Beam ◽  
New Method ◽  
Beam Deflection ◽  
Beam Size ◽  
Thermal Barriers

A new method for calculating signals in photothermal beam-deflection imaging is reviewed and applied to the case of vertical interfaces (cracks or other thermal barriers) in opaque solids. The generality of the approach and the effect of finite probe-beam size are emphasized.

scholarly journals Observation of the beam-size effect at HERA

1995 ◽  
Vol 67 (4) ◽  
pp. 577-583 ◽  
Author(s):  
Krzysztof Piotrzkowski
Keyword(s):  
Size Effect ◽  
Beam Size

Optical Depth Profiling of Thin Films by Impulse Mirage Effect Spectroscopy. Part I: Theory

1994 ◽  
Vol 48 (9) ◽  
pp. 1054-1075 ◽  
Author(s):  
M. A. Schweitzer ◽  
J. F. Power
Keyword(s):  
Probe Beam ◽  
Fluid Layer ◽  
Three Dimensional ◽  
Depth Profiling ◽  
Depth Resolution ◽  
Beam Deflection ◽  
Theoretical Expression ◽  
Mirage Effect ◽  
Photothermal Deflection ◽  
Effect Method

Impulse mirage effect/photothermal deflection spectrometry may be used to detect depth-dependent optical absorption in materials, through the time dependence of the probe beam deflection signal occurring in response to sample irradiation with a short excitation pulse. In this work a theoretical expression was derived for the normal and transverse photothermal deflection signals which occur in a sample with homogeneous thermal properties but where optical absorptivity varies with depth from the surface. An analytical solution of moderate simplicity is obtained for several cases of experimental interest, with three-dimensional heat conduction effects included. The depth profile resolution obtained with the mirage effect method is critically dependent on the distance between the sample layer probed and the offset position of the probe beam in the fluid layer above the sample. Saturation conditions and conditions for obtaining optimal depth resolution of continuous and discrete optical profiles are examined in detail.

Thermal Expansion-Recovery Microscopy (ThERM) for microstructural characterization

2013 ◽  
Vol 1526 ◽  
Author(s):  
Esteban A. Domené ◽  
Nélida Mingolo ◽  
Oscar E. Martínez
Keyword(s):  
Thermal Expansion ◽  
Thermal Diffusivity ◽  
Probe Beam ◽  
Pump Beam ◽  
Surface Deformation ◽  
Modulation Frequency ◽  
Microstructural Characterization ◽  
Sample Surface ◽  
Beam Size ◽  
Detection Schemes

ABSTRACTIn this work we compare two different detection schemes that are sensitive to the focus shift of a probe beam due to induced surface curvature. The technique on which both detection schemes are based is called ThERM (Thermal Expansion-Recovery Microscopy) and allows the retrieval of the thermal diffusivity at microscopic levels, hence mapping such magnitude over a sample surface. The induced thermal expansion defocuses the probe beam due to the surface deformation (curvature). The dependence of the defocusing with the pump modulation frequency yields the thermal diffusivity of the sample at the impinging location. The explored depth is controlled by the pump beam size. By scanning both beams, a complete map of the thermal diffusivity can be retrieved.

scholarly journals New Type of Beam Size Effect in theWBoson Production atμ+μ−Colliders

1996 ◽  
Vol 76 (18) ◽  
pp. 3263-3266 ◽  
Author(s):  
K. Melnikov ◽  
V. G. Serbo
Keyword(s):  
Size Effect ◽  
Beam Size ◽  
New Type
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