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High-frequency acoustic sensors for operation in a gaseous medium. Final report

Description: Photothermal microscopy is a technique for measuring thermal properties on a small scale by using focused laser beams as heat sources and as temperature probes. Typically used for nondestructive evaluation (NDE) of materials, its main advantage is its ability to measure types of flaws that are not visible optically or acoustically. Because of the optical nature of photothermal microscopy, sub-micron resolutions can be obtained in many of these thermal measurements. The greatest limitation of th… more
Date: December 31, 1990
Creator: Kino, G. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MEASUREMENT OF NANOSTRUCTURES WITH MICROMACHINED MICROSCOPES

Description: We have made reproducible scanning probes with high efficiency, and predictable and reproducible character-istics. We obtained good efficiency with dimensions well below the diffraction limit, so that rela-tively small laser powers in the milliwatt range can be used. For single frequency operation, only low power is necessary to obtain very high fields for the excitation of well-defined Raman scattering, and to work in a reflection mode with good scanning speeds; obtained predictable results wi… more
Date: April 30, 2005
Creator: KINO, G.S. & MOERNER, W.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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