A study on motion reduction for suspended platforms used in gravitational wave detectors.

We report a reduction in motion for suspended seismic-isolation platforms in a gravitational wave detector prototype facility. We sense the distance between two seismic-isolation platforms with a suspension platform interferometer and the angular motion with two optical levers. Feedback control loops reduce the length changes between two platforms separated by [Formula: see text] to [Formula: see text] at [Formula: see text], and the angular motion of each platform is reduced to [Formula: see text] at [Formula: see text].

High-throughput optical injection of mammalian cells using a Bessel light beam.

Femtosecond photoporation is an optical method for the injection of membrane impermeable substances into cells. Typically this is a low-throughput method where each cell is individually targeted. Here, we present a novel microfluidic platform with passive optical injection improving previously reported throughputs by one order of magnitude.