Abstract
Micro-scale optical components play a critical role in many applications, in particular when these components are capable of dynamically responding to different stimuli with a controlled variation of their optical behavior. Here, we discuss the potential of micro-scale bi-phase emulsion droplets as a material platform for dynamic fluid optical components. Such droplets act as liquid compound micro-lenses with dynamically tunable focal lengths. They can be reconfigured to focus or scatter light and form images. In addition, we discuss how these droplets can be used to create iridescent structural color with large angular spectral separation. Experimental demonstrations of the emulsion droplet optics are complemented by theoretical analysis and wave-optical modelling. Finally, we provide evidence of the droplets utility as fluidic optical elements in potential application scenarios.
Highlights
Micrometre-scale optical elements have contributed significantly to the miniaturization of optical devices and instrumentation [1,2,3]
Micro-scale optical components play a critical role in many applications, in particular when these components are capable of dynamically responding to different stimuli with a controlled variation of their optical behavior
We discuss the potential of micro-scale bi-phase emulsion droplets as a material platform for dynamic fluid optical components
Summary
Micrometre-scale optical elements have contributed significantly to the miniaturization of optical devices and instrumentation [1,2,3]. We discuss the potential of micro-scale bi-phase emulsion droplets as a material platform for dynamic fluid optical components. Such droplets act as liquid compound micro-lenses with dynamically tunable focal lengths. We discuss how these droplets can be used to create iridescent structural color with large angular spectral separation.
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