Snap-fit assembly of microscopic components by optical tweezers

We investigate that components held in multiple optical traps can be manipulated and assembled together using snap-fit assembly. There are several works on manipulating microscopic objects with optical tweezers and assembling them. However, these techniques cannot sustain the assembled structure after turning off the laser source. In contrast, our technique utilizes snap-fit assembly so that assembled components do not detach. With this approach, components and sub-assemblies can be readily controlled in real-time and assembled into a permanent assembly. Our method can be used for constructing micrometer scale devices.