Self-Induced Back-Action trapping: toward a dynamic conception of optical trapping

摘要

Optical trapping has widely affected both the physical and life sciences. Trapping has evolved from the classical optical tweezers [1], obtained with a strongly focused beam, to sub-diffractive traps taking advantage of plasmonics and subwavelength optics in general. Owing to the strong confinement, trapping of sub-micron particles have been achieved [2]. Yet, while the approaches to produce the trapping potentials changed noticeably from classic tweezers to sub-diffractive traps, they all rely on a static conception of trapping. Indeed, the structures are optimized to produce a maximal field enhancement and confinement to enable trapping of always smaller particles. In this context we recently proposed the concept of Self-Induced Back-Action (SIBA) optical trapping (Fig. 1).