Wide-Gamut and Polarization-Independent Structural Color at Optical Sub-diffraction-Limit Spatial Resolution Based on Uncoupled LSPPs

Abstract

The decreasing pixel size of digital image sensors for high-resolution imaging brings a great challenge for the matching color filters. Currently, the conventional dye color filters with pixel size of several microns set a fundamental limit for the imaging resolution. Here, we put forward a kind of structural color filter with circular nanohole-nanodisk hybrid nanostructure arrays at sub-diffraction-limit spatial resolution based on the uncoupled localized surface plasmon polaritons (LSPPs). Due to the uncoupled LSPPs taking effect, the pixel could generate an individual color even though operating as a single element. The pixel size for the minimum color filtering is as small as 180 × 180 nm 2 , translating into printing pixels at a resolution of ~ 141,000 dots per inch (dpi). In addition, through both the experimental and numerical investigations, the structural color thus generated exhibits wide color gamut, large viewing angle, and polarization independence. These results indicate that the proposed structural color can have enormous potential for diverse applications in nanoscale optical filters, microscale images for security purposes, and high-density optical data storage.

Simple Fabrication of Transparent, Colorless, and Self-Disinfecting Polyethylene Terephthalate Film via Cold Plasma Treatment

“…The B* value of the CF 4 -RIE PET with a 75 nm pitch decreased from 0.61 to 0.50, while that of the Ar-RIE PET with a 35 nm pitch increased to 0.70. Zhao et al [34] and Purtov et al [35] revealed a correlation between the color and pitch of pillar array structures. Zhao et al [34] reported that the color of a silver/chromium/polymethyl methacrylate (PMMA) nanopillar structure with a 70 nm diameter and 150 nm height changed from brown to white (i.e., decreased in B*) with increasing the pitch.…”

Design of mid-infrared filter array based on plasmonic metal nanodiscs array and its application to on-chip spectrometer

“…Since the measurements were made using an FTIR microscope with a NA of 0.6, the incident angle is approximately 37° which may affect the spectral difference. In general, pillar type plasmonic nanodisc arrays are known to have superior angular tolerance compared with other metal nanohole arrays and guided-mode resonance filters that require momentum matching 26 , 27 . Nevertheless, in our simulation (now shown here), as the angle of incidence varies from 0° to 40°, the resonance wavelength redshifts just about 8% and the transmittance dip depth decreases by 17% for p-polarized light.…”

Nanostructured Color Filters: A Review of Recent Developments

“…Recently, spatial resolution of approximately 141,000 dpi with a wide gamut and large angle invariant was achieved by implementing circular nanohole-nano-disk hybrid nanostructure arrays based on the uncoupled Localized Surface Plasmon Polaritons (LSPPs) [ 171 ] ( Figure 5 c). The spanned across the visible regime by varying the diameter of the nanodisk-nanohole structure rather than its periodicity.…”

“…Copyright American Chemical Society, 2014. ( c ) Color printing resolution test pattern for LSPP based nanostructures at the scale bar of (i) 200 nm, (ii) 1 m and (iii) 500 nm [ 171 ].…”