Fabrication of Fresnel plates on optical fibres by FIB milling for optical trapping, manipulation and detection of single cells

Abstract

The development of economical optical devices with a reduced footprint foreseeing manipulation, sorting and detection of single cells and other micro particles have been encouraged by cellular biology requirements. Nonetheless, researchers are still ambitious for advances in this field. This paper presents Fresnel zone and phase plates fabricated on mode expanded optical fibres for optical trapping. The diffractive structures were fabricated using focused ion beam milling. The zone plates presented in this work have focal distance of ~5 µm, while the focal distance of the phase plates is ~10 µm. The phase plates are implemented in an optical trapping configuration, and 2D manipulation and detection of 8 µm PMMA beads and yeast cells is reported. This enables new applications for optical trapping setups based on diffractive optical elements on optical fibre tips, where feedback systems can be integrated to automatically detect, manipulate and sort cells.

Recent Trends in Optical Manipulation Inspired by Mesoscale Photonics and Diffraction Optics

“…Additionally, different shape of the ultraprecise laser scalpel can be designed based on the photonic hook concept [70]. The integration of a glass microsphere, produced the PNJ, on the tip of the multimode fiber [71] or Fresnel zone plate [72][73][74] allow to stable trapping of a single nanoparticle.…”

Bifocal Ultrasound Focusing Using Bi-Fresnel Zone Plate Lenses

“…FZPs are monofocal planar lenses formed by concentric rings of decreasing width, known as Fresnel regions. These devices have been widely used in various fields of physics, such as X-rays [13,14], optics [15][16][17], microwaves [18,19], and acoustics [20][21][22]. In [23], J. Kim et al presented a method to achieve multifocal focusing profiles based on the phase conjugation principle and the phase-opposition blocking criterion used in conventional FZPs.…”

M-Bonacci Zone Plates for Ultrasound Focusing

“…A FZP focuses waves through constructive interference of the diffracted field in its apertures. These devices can be found in all sorts of applications, such as optical trapping [12], planar antenna design [13], or ultrasound focusing applications [9,10,14]. In optics, the distance between the transducer and the lens is usually large enough to consider plane wave incidence.…”