Design and simulation of omnidirectional reflective color filters based on metal-dielectric-metal structure.

We propose omnidirectional reflective color filters based on metal-dielectric-metal subwavelength grating structure. By particle swarm optimization, the structural parameters of three color filters (yellow, magenta, cyan) are obtained. The optimized filters can present the same perceived specular color at unpolarized illumination for a broad range of incident angles. The reflectance curves at different incident angles keep almost invariable and the color difference is less than 6 in CIEDE2000 formula up to 45°. Angle-insensitive properties including the incident angular tolerance, azimuthal angular tolerance and the polarization effect are investigated thoroughly to construct a real omnidirectional color filter. Through the analysis of the magnetic field, the physical origin is verified that the total absorption band at specific wavelength results from the localized surface plasmon resonance responsible for the angle insensitive spectral filtering.

[1]  Xu Liu,et al.  Design of reflective color filters with high angular tolerance by particle swarm optimization method. , 2013, Optics express.

[2]  Sorin Tibuleac,et al.  Reflection and transmission guided-mode resonance filters , 1997 .

[3]  Allen Taflove,et al.  Application of the Finite-Difference Time-Domain Method to Sinusoidal Steady-State Electromagnetic-Penetration Problems , 1980, IEEE Transactions on Electromagnetic Compatibility.

[4]  Huigao Duan,et al.  Printing colour at the optical diffraction limit. , 2012, Nature nanotechnology.

[5]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.

[6]  S. S. Wang,et al.  Multilayer waveguide-grating filters. , 1995, Applied optics.

[7]  Cheng Zhang,et al.  Angle-Insensitive Structural Colours based on Metallic Nanocavities and Coloured Pixels beyond the Diffraction Limit , 2012, Scientific Reports.

[8]  Xiangang Luo,et al.  Plasmonic nanoresonators for high-resolution colour filtering and spectral imaging. , 2010, Nature communications.

[9]  K. Yee.  Numerical solution of initial boundary value problems involving maxwell's equations in isotropic media , 1966 .

[10]  Wencheng Wu,et al.  The CIEDE2000 color-difference formula: Implementation notes, supplementary test data, and mathematical observations , 2005 .

[11]  Anders Kristensen,et al.  Color effects from scattering on random surface structures in dielectrics. , 2012, Optics express.

[12]  S. S. Wang,et al.  Design of waveguide-grating filters with symmetrical line shapes and low sidebands. , 1994, Optics letters.