Polarization-dependent aluminum metasurface operating at 450 nm

Abstract

We report on a polarization-dependent plasmonic aluminumbased high-density metasurface operating at blue wavelengths. The fabricated sub-wavelength structures, tailored in size and geometry, possess strong, localized, plasmonic resonances able to control linear polarization. Best performance is achieved by rotating an elongated rectangular structure of length 180 nm and width 110 nm inside a square lattice of period 250 nm. In the case of 45 degrees rotation of the structure with respect to the lattice, the normal-incidence reflectance drops around the resonance wavelength of 457 nm from about 60 percent to below 2 percent. A. 106, 19227-19232 (2009). 9. X. Zhu, S. Xiao, L. Shi, X. Liu, J. Zi, O. Hansen, and N. A. Mortensen, "A stretch-tunable plasmonic structure with a polarization-dependent response," Opt. Express 20, 5237 (2012). 10. W. Chen, M. Tymchenko, P. Gopalan, X. Ye, Y. Wu, M. Zhang, C. B. Murray, A. Alu, and C. R. Kagan, "Largearea nanoimprinted colloidal Au nanocrystal-based nanoantennas for ultrathin polarizing plasmonic metasurfaces," Nano Lett. 15, 5254-5260 (2015). 11.

Resonant laser printing of structural colors on high-index dielectric metasurfaces

“…By elongating the disks into bars (Fig. 4A), we show that the asymmetric structures can support tunable color under polarized incident light in the visible spectrum, in a similar manner to plasmonic structures ( 74 , 75 ). When the local cylindrical rotational symmetry is lifted, the response of our electric and magnetic dipole modes becomes polarization-dependent, and colors can be switched continuously through polarization tuning (Fig.…”

Resonant laser printing of bi-material metasurfaces: from plasmonic to photonic optical response

“…4). Structural colors based on metal or semi-conductor metasurfaces [25][26][27][28][29][30][31][32][33][34][35][36][37] have huge potential for use in surface decorations [7,38] and color filters [39][40][41] and have already been upscaled using roll-to-roll methods [42]. Our bi-material metasurface can be manipulated using DRLP to draw any desired image (Fig.…”

Multiphysics modelling of manufacturing processes: A review

“…128,129 Since the early observations of functional nanostructures in nature, engineers have tried to replicate these nanostructures in order to functionalize surfaces. [130][131][132] Recently, Christiansen et al 127 developed a surface consisting of 1D gratings with varying wave length and orientation, resulting in a glitter colour effect, where the colour appearance is angle dependent, see Figure 9(a). The nanostructures are in first place created in a clean room, where technologies from the semiconductor industry, such as electron beam lithography (EBL) and standard ultraviolet (UV)) lithography, are applied in order to transfer the nanostructures to a silicon wafer.…”