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TABLE 1 Summary of the Advantages, Disadvantages, and General Applications of High-Resolution Electrical, Near- and Far-Field Thermal Techniques (An Indicative Reference Is Included for Each Technique)—Cont’d Method Principle (mm) 101 (K) (ms) 101 Advantages Disadvantages Thermoreflectance (Cahill, 2004) Temperature dependence of the reflection 102 l High thermal and temporal resolution l Requires the calibration of the reflectivity index l Spatial resolution limited by the diffraction limit Raman (Kim et al., 2006) Inelastic scattering of monochromatic light 1 101 106 l No sample preparation needed l Highly time-consuming technique implying image point analysis as slow as 0.5 point s1 Microthermocouple (Watanabe et al., 2005) Seebeck effect 102 101 10 l Precise temperature calibration l The thermometer is separated from the active region of the device limiting, at very short timescales, the access to it Typical Resolution dx dT dT l Quantitative and qualitative measurement (Lo€w et al., 2008) l Thermoreflectance coefficient is not available for l Works in solids and liquids l Small volumes (<1 mm l Low signal levels l Cross talk with fluorescent molecules diameter) can be probed l Spatial resolution (at one dimension) of 25 nm l Additional fabrication effort required l Voltage reflections and capacitive coupling limit every material and depends on excitation wavelength and thickness of the optical layer the timescale for transient thermometry of the devicePDF Image | HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS
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