Microdrones with golden motors appeared: they are controlled with the help of light

Microdrones consist of a transparent polymer disk with a diameter of 2.5 micrometers. Motors are built into the disk,

which work individually and are made of gold.

The authors were inspired by the design of conventionalquadcopter drones, which have four independent rotors that allow you to fully control the movement. If such a design is created, then microdrones will be able to interact with nano- and micro-objects, for example, to assemble nanostructures, to analyze surfaces with nanometer precision, or in the field of reproductive medicine.

The engines are based on optical antennas.These are tiny metal structures that are smaller than the wavelength of light. They are optimized to receive light with circular polarization. This allows the motors to receive light regardless of the orientation of the drone.

Xiaofei Wu, postdoc of the Hecht Research Group

Wu added that in the next stage, the received light energy begins to radiate the engine in a certain direction. This helps create the optical power of the recoil.

As a result, the researchers were able to efficiently and accurately control their microdrones. Also, the devices themselves are small in mass, so they can accelerate very strongly.

At the next stage of work, the research team plans to refine the device so that it is possible to control the height of unmanned aerial vehicles above the surface.

Read more:

It has been hunted for centuries: what do we know about the planet Vulcan next to the Sun

Physicists have experimentally confirmed a new fundamental law for liquids

Astronomers have found a planet near the Earth: it has a very strange orbit