Microfabricated zone plate for optical trapping

摘要

The integration of optical tweezers into microfluidic chips would open up ways to sort and manipulate particles and carry out biophysical force measurements But the short working distance,size,and cost of microscopic lenses hinder their in-tegration into microfluidic chips.Kenneth Crozier and colleagues at Harvard University have now fabricated a Fresnel zone plate capable of producing well-calibrated optical traps in microfluidic systems.