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An opto-piezoelectric laminate composed of a photosensitive electrode and a PZT (Lead Zirconate Titan ate) layer modulated by a light field was adopted as the research platform of this paper. The photosensitive electrode is a thin film formed by mixing TiOPc (Titanium oxide phthalocyanine) and a copolymer. During operation, the instant variation of TiOPc impedance when illuminated with light beam...
Experimental results obtained by applying both technique, Electronic Speckle Pattern Interferometry (ESPI) and Electronic Speckle Pattern Shearing Interferometry (ESPSI) were compared in the study of composite materials. We found that the difference between the strain fields obtained by ESPSI and ESPI was roughly a constant. This result was expected since, although ESPI in turn allows computing absolute...
This paper presents the design of a mesoscale robot for laser phonosurgery. The proposed design is situated between conventional mechanism and MEMS technology. A combination of compliant structures and innovative micro motors enables to achieve two decoupled tilting angle, a high range (up to 45°) and a precise positioning of a laser beam. The design methodology and the optimization of the compliant...
Bead-based immunoassay has been growing as a promising technology in the point-of-care diagnostics due to great flexibility. For samples with dilute analytes, the colloidal particles can concentrate dispersed analytes and act as carriers for advanced particle manipulation. To realize a rapid in-situ immunoassay, Firster resonance energy transfer (FRET) was used herein to ensure only the target antigen...
A control of degrees of freedom in the manipulation of light, including amplitude, phase and polarization is important for femto second laser processing with effective light-matter interactions. In this study, we demonstrate femto second laser processing with full control of phase distributions and polarization states of light by computer-generated holograms displayed on the spatial light modulators.
In this article we present the status of our new setup to determine coefficients of thermal expansions (CTE) of ultra stable materials at temperatures from 300K down to 100 K. Such low CTE materials are important for dimensionally stable structures in space and terrestrial applications e.g. To enable precise measurements. This setup is an advancement of a measurement facility for CTE determination...
This paper investigates the use of a PMN-PT [001] piezoelectric actuator to be integrated in smart Micro-Opto-Electrical-Mechanicals Systems (MOEMS). Unlike most piezoelectric materials, PMN-PT [001] can generate large-stroke out-of-plane displacement. This is due to its very high longitudinal piezoelectric coefficient of up to 4500pm/V. After an introduction on MOEMS actuation and a short description...
A computerized system for real-time displacement visualization using carrier fringes in an electronic speckle in-plane sensitive interferometer allows force calibration for micro-displacement analisis of rat bones, and verification of axial loading conditions. Once the force has been calibrated and the load is applied along the bone axis, the difference of phase method and the phase stepping method...
The mechanical properties of micron and nanometer scale thin films have become an important issues in modern microelectronics. Here, two recent development of using optical methods to measure the mechanical properties of thin films were introduced. First, a paddle-like cantilever beam test structure with nanometer scale metal films on top was design and developed. Film strain and stresses of different...
The quality of a laser micro-polished (LμP) surface is dependent upon the part material, initial surface topography and roughness, and the energy density of the beam used to produce a thin molten layer on the finished part. Prior research has shown that the amount of energy delivered to the work piece can also be controlled by adjusting the "focal offset distance" (FOD) of...
A robust wavelength-scanning interferometer is developed by combining a channeled spectroscopic polarization state generator (CSPSG) and a Polari metric common-path cyclical interferometer. Unlike standard configurations of wavelength-scanning interferometers, the present configuration requires no spatially separated optical paths to introduce the phase- or frequency-shift due to the wavelength scanning,...
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