Thermo-optical spectroscopy: Detection by the ’’mirage effect’’

Boccara, A. C.; Fournier, D.; Badoz, J.

doi:10.1063/1.91395

Cited by 702 publications

(251 citation statements)

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“…Photothermal techniques include photothermal displacement, 7 photothermal beam deflection (or "mirage"), 8 photothermal radiometry (PTR), 9 and photothermal reflectance (or thermoreflectance). [10][11][12][13] Thermoreflectance techniques may be distinguished as one of the two measurement types: time-domain and frequencydomain measurements.…”

Section: Introductionmentioning

confidence: 99%

Parametric study of the frequency-domain thermoreflectance technique

Xing

Jensen

Hua

et al. 2012

Journal of Applied Physics

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Thermal conductivity measurements of non-metals via combined time-and frequency-domain thermoreflectance without a metal film transducer Review of Scientific Instruments 87, 094902 (2016) Without requiring regression for parameter determination, one-dimensional (1D) analytical models are used by many research groups to extract the thermal properties in frequency-domain thermoreflectance measurements. Experimentally, this approach involves heating the sample with a pump laser and probing the temperature response with spatially coincident probe laser. Micron order lateral resolution can be obtained by tightly focusing the pump and probe lasers. However, small laser beam spot sizes necessarily bring into question the assumptions associated with 1D analytical models. In this study, we analyzed the applicability of 1D analytical models by comparing to 2D analytical and fully numerical models. Specifically, we considered a generic nlayer two-dimensional (2D), axisymmetric analytical model including effects of volumetric heat absorption, contact resistance, and anisotropic properties. In addition, a finite element numerical model was employed to consider nonlinear effects caused by temperature dependent thermal conductivity. Nonlinearity is of germane importance to frequency domain approaches because the experimental geometry is such that the probe is always sensing the maximum temperature fluctuation. To quantify the applicability of the 1D model, parametric studies were performed considering the effects of: film thickness, heating laser size, probe laser size, substrate-to-film effusivity ratio, interfacial thermal resistance between layers, volumetric heating, substrate thermal conductivity, nonlinear boundary conditions, and anisotropic and temperature dependent thermal conductivity. V C 2012 American Institute of Physics. [http://dx

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Section: Introductionmentioning

confidence: 99%

Parametric study of the frequency-domain thermoreflectance technique

Xing

Jensen

Hua

et al. 2012

Journal of Applied Physics

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“…This paper presents Optical Beam Deflection (OBD) studies of CdS using an electron beam as an excitation source and a subbandgap optical beam as a probe to study electron transport mechanisms resulting from electron loss in the specimen. The OBD method monitors the deflection of the probe beam produced by an index of refraction gradient field in the sample induced by the exciting beam [2,3]. Beam deflection measurements were made as a function of depth in both the time and frequency domains.…”

Section: Introductionmentioning

confidence: 99%

Time Resolved Optical Detection of Electron Loss and Migration in CdS

Chang

Givens

Spicer

et al. 1991

Review of Progress in Quantitative Nondestructive Evaluation

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“…This suggests that for a > 1/3, a new site may have appeared for CO adsorption on Rh. Indeed, previous studies [15] have shown that CO adsorbs to Rh on the top sites if 6 < 1/3, and on both the top sites and the bridge sites if 6 > 113. Using the model of noninteracting adsorption sites, we can again-write the surface nonlinear sus-ceptibili ty as for6.s_113 A + B/36s + C(6 -1/3)/6s for 1/3 .S.…”

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confidence: 99%

“…Using the model of noninteracting adsorption sites, we can again-write the surface nonlinear sus-ceptibili ty as for6.s_113 A + B/36s + C(6 -1/3)/6s for 1/3 .S. 6 .S. 314.…”

mentioning

confidence: 99%

“…It is found that laser-induced fluorescence or resonant ionization can be used to probe angular, velocity, and internal energy distributions of molecules scattered or desorbed from a surface [2]. Coherent Raman spectroscopy [3], laser-induced desorption [4], photoacoustic spectroscopy [5], and photothermal deflection spectroscopy [6] can be used to study surface states and molecular vibrations of adsorbates. Lately, we have shown that surface second harmonic generation (SHG) is also an effective tool for surface studies [7].…”

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confidence: 99%

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