Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
Nanophotonic Metasurfaces for Biosensing and Imaging
EPFL, Swiss Federal Institute in Lausanne, Switzerland
Nanophotonics excels at confining light into nanoscale optical mode volumes and generating dramatically enhanced light matter interactions. Our lab exploits these unique aspects to introduce powerful biosensors that can have impact on a wide range of fields including basic research in life sciences, early disease diagnostics, safety and point-of-care testing. In particular, we exploit nanophotonics and its integration with microfluidics to address key challenges of current biosensors and develop devices that can enable label-free, ultra-sensitive, multiplexed, rapid and real-time measurements on biomolecules, pathogens and living systems. In this talk I will present some of our recent work on nanophotonic metasurfaces for biosensing and bioimaging as well as their applications in real-world settings.
Fast and Accurate Thickness Mapping of Thin Liquid Films
Zhe Wang1,2, Vincenzo Ferraro3, Biagio Mandracchia1, Ernesto Di Maio3, Pier Luca Maffettone3, Pietro Ferraro1
1ISASI-CNR, Italy; 2College of Applied Sciences, Beijing University of Technology, China; 3Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, Italy
The thickness of thin liquid films is of great interest to industrial processes and life science. However, there are not appropriate quantitative experimental tools for an adequate study of film evolution in case of not-ideal conditions. Here, we show the application of a holographic system for the evaluation of the 3D topography and thickness of evolving protein films. We use a custom holographic microscope that combines quantitative phase imaging with materials engineering. This technique offers an unprecedented level of details and we anticipate that it will promote a deeper understanding of the underlying physics of thin film dynamics.
University of Colorado Boulder, United States of America
Man-made nano- and micro-motors are key to many future applications. I will describe highly reconfigurable self-assembly of colloidal micro-motors that exhibit a repetitive rotation when immersed in a liquid crystal and powered by a continuous exposure to unstructured ~1nW light. A monolayer of self-assembled azobenzene molecules defines how the liquid crystal’s optical axis mechanically couples to the colloidal particle’s surface, as well as how they jointly rotate as the light’s polarization changes. The rotating particle twists the liquid crystal, which, in turn changes polarization of the light traversing it. The resulting feedback mechanism spontaneously yields a continuous opto-mechanical cycle and drives the unidirectional particle spinning, with handedness and frequency robustly controlled by polarization and intensity of light. I will discuss how this may enable new forms of active matter and self-assembled machines.