DUOCASTELLA , Martí

Individual or arrayed microlenses offer remarkable opportunities in optics and photonics. However, their usage is currently limited by the lack of manufacturing technologies capable of tailoring the lens geometry to target devices. Here, we demonstrate how laser catapulting (LCP), a recent laser-based additive manufacturing technique, enables...

The intrinsic laminarity of microfluidic devices impedes the mixing of multiple fluids over short temporal or spatial scales. Despite the existence of several mixers capable of stirring and stretching the flows to promote mixing, most approaches sacrifice temporal or spatial control, portability, or flexibility in terms of operating flow rates....

In this work, we synergistically combine laser-induced forward transfer (LIFT) and replica molding for the fabrication of microlenses with control of their geometry and size independent of the material or substrate used. Our approach is based on a multistep process in which liquid microdroplets of an aqueous solution are first printed on a...

High fill-factor microlens arrays (MLA) are key for improving photon collection efficiency in light-sensitive devices. Although several techniques are now capable of producing high-quality MLA, they can be limited in fill-factor, precision, the range of suitable substrates, or the possibility to generate arbitrary arrays. Here, a novel additive...

Bessel and annular laser beams offer intriguing possibilities for material processing. However, current beam shaping methods can be limited in tunability, speed, or parallelization possibilities. Here, we show how ultrasounds in liquids enable generating user-selectable arrays of Gaussian, Bessel-like, or annular beams. By cascading two...

Abstract image Two-photon microscopy is the tool of choice for fluorescence imaging of deep tissues with high resolution, but can be limited in three-dimensional acquisition speed and penetration depth. In this work, these issues are addressed by using an acoustic optofluidic lens capable of ultrafast beam shaping on a pixel basis. Driving the...

This chapter discusses in detail the current problems related to the preparation of liquid films in laser-induced forward transfer (LIFT), from fundamental aspects to practical problems. It introduces film-free LIFT (FF-LIFT), explains its physical principles, and describes the different modalities in which the technique can be implemented. It...

Three-dimensional imaging at high-spatiotemporal resolutions and over large penetration depths is key for unmasking the dynamics and structural organization of complex biological systems. However, the need to axially shift the focus, with consequent limitations in imaging speed, and signal degradation at large depths due to scattering effects,...

Fast noninvasive three-dimensional (3D) imaging is crucial for quantitatively studying highly dynamic events ranging from flow cytometry to developmental biology. Light-sheet microscopy has emerged as the tool-of-choice for 3D characterization of rapidly evolving systems. However, to obtain a 3D image, either the sample or parts of the...

The high-throughput generation of polymeric nanoparticles (PNPs) with tailored size and narrow size distribution is key for applications as relevant as sensing and nanomedicine. Here we show how cavitation bubbles in a microfluidic channel can induce rapid nanoprecipitation of PNPs with user-selectable control. Specifically, we used two...

The precise localization of nanometric objects in three dimensions is essential to identify functional diffusion mechanisms in complex systems at the cellular or molecular level. However, most optical methods can achieve high temporal resolution and high localization precision only in two dimensions or over a limited axial (z) range. Here we...

Light-sheet microscopes with an extended depth of field (EDOF) offer a simple but powerful route toward fast volumetric imaging. However, methods for EDOF typically result in a loss of signal-to-noise ratio. Here, we propose a parallelization strategy as a simple solution. By illuminating multiple acoustically generated light sheets at...

We propose a novel light-sheet microscope, capable of high-speed volumetric imaging with high contrast and signal-to-noise ratio. The working principle is founded on extending the depth-of-field and enconding the illumination with multiple light-sheets.

Direct laser writing (DLW) lithography has emerged as a competitive additive tool for the fabrication of detailed three-dimensional (3D) structures with a minimum feature size close to the nanometer scale. However, the minimal distance between adjacently written features with no overlapping, that is the writing resolution, is not in the same...

Light focusing through a microbead leads to the formation of a photonic nanojet functional for enhancing the spatial resolution of traditional optical systems. Despite numerous works that prove this phenomenon, a method to appropriately translate the nanojet on top of a region of interest is still missing. Here, by using advanced 3D fabrication...