Arrays of individually controllable optical tweezers based on 3D-printed microlens arrays
Abstract
We present a novel platform of optical tweezers which combines rapid prototyping of user-definable microlens arrays with spatial light modulation (SLM) for dynamical control of each associated tweezer spot. Applying femtosecond direct laser writing, we manufacture a microlens array of 97 lenslets exhibiting quadratic and hexagonal packing and a transition region between the two. We use a digital micromirror device (DMD) to adapt the light field illuminating the individual lenslets and present a detailed characterization of the full optical system. In an unprecedented fashion, this novel platform combines the stability given by prefabricated solid optical elements, fast reengineering by rapid optical prototyping, DMD-based real-time control of each focal spot, and extensive scalability of the tweezer pattern. The accessible tweezer properties are adaptable within a wide range of parameters in a straightforward way.
Keywords
Cite
@article{arxiv.1905.06929,
title = {Arrays of individually controllable optical tweezers based on 3D-printed microlens arrays},
author = {Dominik Schäffner and Tilman Preuschoff and Simon Ristok and Lukas Brozio and Malte Schlosser and Harald Giessen and Gerhard Birkl},
journal= {arXiv preprint arXiv:1905.06929},
year = {2020}
}