Direct and high-throughput fabrication of mie-resonant metasurfaces via single pulse laser interference

Nanostructure-modulated planar high spectral resolution spectro-polarimeter

We present a planar spectro-polarimeter based on Fabry-Pérot cavities with embedded polarization-sensitive high-index nanostructures. A 7 μm-thick spectro-polarimetric system for 3 spectral bands and 2 linear polarization states is experimentally demonstrated. Furthermore, an optimal design is theoretically proposed, estimating that a system...

Laser-induced spatially-selective tailoring of high-index dielectric metasurfaces

Optically resonant high-index dielectric metasurfaces featuring Mie-type electric and magnetic resonances are usually fabricated by means of planar technologies, which limit the degrees of freedom in tunability and scalability of the fabricated systems. Therefore, we propose a complimentary post-processing technique based on ultrashort (≤ 10 ps)...

Submicrometer Nanostructure-Based RGB Filters for CMOS Image Sensors

Digital color imaging relies on spectral filters on top of a pixelated sensor, such as a CMOS image sensor. An important parameter of imaging devices is their resolution, which depends on the size of the pixels. For many applications, a high resolution is desirable, consequently requiring small spectral filters. Dielectric nanostructures, due to...

Mapping the near-field interaction of silicon nanodisc arrays by automated dual-tip scanning near-field optical microscopy

Dual-tip scanning near-field optical microscopy (SNOM) facilitates high-precision spatial positioning of a point-like emitter and detector and has the capability of mapping optical near-field information very close to the dipole-like excitation. Hence, it opens new opportunities to characterize the optical near-field response of subwavelength...

Color filter arrays based on dielectric metasurface elements

Digital imaging has been steadily improving over the past decades and we are moving towards a wide use of multi- and hyperspectral cameras. A key component of such imaging systems are color filter arrays, which define the spectrum of light detected by each camera pixel. Hence, it is essential to develop a variable, robust and scalable way for...