Optically driven Janus microengine with full orbital motion control

Alessandro Magazzu; David Bronte Ciriza; Agnese Callegari; Maria Grazia Donato; Berk Çiçek; Iryna Kasianiuk; Denis Kasyanyuk; Falko Schmidt; Antonino Foti; Pietro Giuseppe Gucciardi; Giovanni Volpe; Maurizio Lanza; Luca Biancofiore; Onofrio Maria Maragò

doi:10.1117/12.3029378

3 October 2024 Optically driven Janus microengine with full orbital motion control

Alessandro Magazzu, David Bronte Ciriza, Agnese Callegari, Maria Grazia Donato, Berk Çiçek, Iryna Kasianiuk, Denis Kasyanyuk, Falko Schmidt, Antonino Foti, Pietro Giuseppe Gucciardi, Giovanni Volpe, Maurizio Lanza, Luca Biancofiore, Onofrio Maria Maragò

Author Affiliations +

Proceedings Volume PC13112, Optical Trapping and Optical Micromanipulation XXI; PC131120L (2024) https://doi.org/10.1117/12.3029378
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

Microengines have shown promise for a variety of applications in nanotechnology, from microfluidics to nanomedicine and targeted drug delivery. However, their precise control over their dynamics is still challenging. We introduce a micro engine that exploits both optical and thermal effects to achieve a high degree of controllability. We find that a gold-silica Janus particle illuminated by a high focused laser beam can be confined at the stationary point where the optical and thermal forces balance. By using circularly polarized light the symmetry between these forces can be broken by transferring angular momentum to the particle, resulting in a tangential force that induces an orbital motion of the particle. We can simultaneously control the velocity and direction of rotation of the particle, changing the ellipticity of the incoming light beam while tuning the radius of the orbit with laser power. We validate our results using a geometrical optics model that incorporates optical force, the absorption of optical power, and the resulting heating of the particle.

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Citation Download Citation

Alessandro Magazzu, David Bronte Ciriza, Agnese Callegari, Maria Grazia Donato, Berk Çiçek, Iryna Kasianiuk, Denis Kasyanyuk, Falko Schmidt, Antonino Foti, Pietro Giuseppe Gucciardi, Giovanni Volpe, Maurizio Lanza, Luca Biancofiore, and Onofrio Maria Maragò "Optically driven Janus microengine with full orbital motion control", Proc. SPIE PC13112, Optical Trapping and Optical Micromanipulation XXI, PC131120L (3 October 2024); https://doi.org/10.1117/12.3029378

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KEYWORDS

Particles

Motion controllers

Angular momentum

Nanomedicine

Nanotechnology

Optical tweezers

Polarization

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