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Colorful Optical Vortices with White Light Illumination
Hongtao Wang, Hao Wang, Qifeng Ruan +8
The orbital angular momentum (OAM) of light holds great promise for applications in optical communication, super-resolution imaging, and high-dimensional quantum computing. However…
Full Geometric Control of Hidden Color Information in Diffraction Gratings under Angled White Light Illumination
John You En Chan, Qifeng Ruan, Hongtao Wang +5
Under white light illumination, gratings produce an angular distribution of wavelengths dependent on the diffraction order and geometric parameters. However, previous studies of gr…
High-order Photonic Cavity Modes Enabled 3D Structural Color
Hailong Liu, Hongtao Wang, Hao Wang +8
It remains a challenge to directly print three-dimensional arbitrary shapes that exhibit structural colors at the micrometer scale. Woodpile photonic crystals (WPCs) fabricated via…
Reconfiguring colours of single relief structures by directional stretching
Qifeng Ruan, Wang Zhang, Hao Wang +7
Colour changes can be achieved by straining photonic crystals or gratings embedded in stretchable materials. However, the multiple repeat units and the need for a volumetric assemb…
Painting with Hue, Saturation, and Brightness Control by Nanoscale 3D Printing
Hao Wang, Qifeng Ruan, Hongtao Wang +7
Varying only the in-plane or out-of-plane dimensions of nanostructures produces a wide range of colourful elements in metasurfaces and thin films. However, achieving shades of grey…
Structural Color 3D Printing By Shrinking Photonic Crystals
Yejing Liu, Hao Wang, Jinfa Ho +9
The rings, spots and stripes found on some butterflies, Pachyrhynchus weevils, and many chameleons are notable examples of natural organisms employing photonic crystals to produce…
Wide band gap phase change material tuned visible photonics
Weiling Dong, Hailong Liu, Jitendra K Behera +6
Light strongly interacts with structures that are of a similar scale to its wavelength; typically nanoscale features for light in the visible spectrum. However, the optical respons…
Holographic Colour Prints: Enhanced Optical Security by Combined Phase and Amplitude Control
Kevin T. P. Lim, Hailong Liu, Yejing Liu +1
We created a novel optical security device that integrates multiple computer-generated holograms within a single colour image. Under white light, this "holographic colour print" ap…