Abstract
Conventional three-dimensional optics requires curvature to control the wave front of light thus making it difficult to reduce the size of the optical systems. Furthermore, for correction of optical aberrations, complex optical systems comprising more than one lens are used. This adds additional bulk, mass and complexity to the optical systems. Recent development in diffractive optics has enabled new thin lightweight optical elements such as metalenses. We introduce resonant laser printing technique as a flexible photo-thermal technology for metalens fabrication with the ability to control the light with microscale precision. Our laser printed metalenses can be integrated in bio-sensors, bio-imaging systems, and optofluidical devices.
Highlights
Optical metasurfaces are arrays of sub-wavelength sized elements - meta-atoms - enabling precise control of phase, amplitude and polarization of light [1]
We introduce resonant laser printing (RLP) as a technique for fast and precise metasurface modification [6,7,8,9]
Nanosecond laser pulses are used for this process as the meta-atoms absorb the laser pulses and converts the energy to heat, which raises the temperature of the meta-atoms and causes them to melt and solidify in a short time period
Summary
Optical metasurfaces are arrays of sub-wavelength sized elements - meta-atoms - enabling precise control of phase, amplitude and polarization of light [1]. These metasurfaces are made from metallic (e.g. aluminum [2]) or highindex (e.g. silicon [3]) nano or micro sized arrays of metaatoms that gives the surface unique optical features. We introduce resonant laser printing (RLP) as a technique for fast and precise metasurface modification [6,7,8,9].
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