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We present diffraction efficiencies of hollow silica nanospheres coated layer by calculation using a rigorous coupled wave analysis (RCWA) method. The results show the effect of inner ratios, diameters on the diffraction efficiency. We also compare reflection / transmission characteristics with conventional antireflection coatings.
We report a multi nozzle electrohydrodynamic (EHD) printing head by using batch fabrication for the first time. Inks can be ejected from a glass nozzle by applied large electric field. Tiny nozzles with a outer diameter of 100 microns are fabricated by sand blasting on a glass wafer. A stable continuous jetting with a commercial carbon black ink was observed. Continuous lines with a width of 30 microns...
This paper describes a novel tweezing system using cavitational microstreaming flows generated by acoustically oscillating twin bubbles for non-contact micromanipulation. A tweezing system with a single acoustically oscillating bubble attached on the tip of a rod integrated with a three-dimensional traverse system is firstly tested to manipulate a fish egg (1 mm diameter) in an aqueous medium. Although...
Photonic crystal fibers (PCFs) consist of arrays of micrometer-size hollow channels extending along the entire fiber length. A new approach to modify the optical properties and to improve the design flexibility of such fibers is to fill the air holes of the array by with different materials, realizing all-solid hybrid fiber structures. In this talk, recent results on silica PCF filled with noble metals,...
Optical absorption and photoluminescence properties of the borosilicate glasses containing bismuth were investigated. The visible light emission near 655nm was obtained by excitation with the high power xenon lamp at 450 nm. Absorption appeared at 500 and 700nm and photoluminescence were found to decrease with the increase of bismuth content.
Here we review on our results of photonic crystal fibres (PCFs) which have been filled with solid materials such as metals, semiconductors and low-melting temperature compound glasses. As filling method we used the high-temperature pressure cell technique. Depending on the material in the air-holes, we observed the excitation of spiralling plasmonic modes, Mie-resonances and coupled waveguide modes...
A major challenge in cell replacement therapy for neurological diseases is the sorting of differentiated neurons because conventional cell sorting techniques require cells in suspension. Recently, spherical glass beads have been demonstrated as a movable growth substrate, allowing transport of differentiated neurons without dissociation. Phototransistor-based optoelectronic tweezers provides a gentle...
This paper presents a generic vacuum packaging technology for environment-resistant MEMS devices. This packaging approach simultaneously provides low-power oven-controlled thermal environment and vibration isolation using an isolation platform. The oven-controlled structure is thermally isolated from the environment by crab-leg suspensions made out of a 100 mum-thick glass wafer, an anti-radiation...
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