Hysteresis and balance of backaction force on dielectric particles photothermally mediated by photonic nanojet.

ABSTRACT: Reversible control over the microparticle motion using light excites interesting applications in optofluidics, microswimmers, artificial optical matter, and biomedical engineering. The dielectric microspheres swim towards the near infrared pulsed laser in response to the backaction force mediated by photonic nanojet. Hereby, we report that the backaction force exhibits hysteretic behaviour owing to the distinguishable responses of the temperature rise inside the nanojet and the temperature rise of the liquid ensemble. Accordingly, the magnitude of backaction force at the same laser power varies between power increase and decrease stages. In order to develop multidimensional manipulation tool, we studied the possibility of using lasers with different spatiotemporal profiles to mediate the b

SUBMITTER: Ren YX 

PROVIDER: S-EPMC11501579 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature