Ultrathin Full-Color Hologram Work Published in ACS Nano

Drs. Gao and Yang published a new approach for making ultrathin holograms for producing full-color holographic images in the journal of ACS Nano, one top journal in nanoscience and nanotechnology research. Their findings hold promise for future technologies such as 3D floating displays for cell phones, security marking on credit cards, and biomedical imaging.

As described in their article, “Full-Color Plasmonic Metasurface Holograms” (http://pubs.acs.org/doi/abs/10.1021/acsnano.6b05453), the hologram is made up of a single 35-nanometer thick aluminum film punctured with many tiny rectangular holes with various orientation angles created by focused ion beam milling. “By varying the orientation angle of holes, the phase modulation can be realized in the entire visible spectrum. While the amplitude modulation is achieved by simply including or not including the holes,” says Dr. Xiaodong Yang, “our holograms contain both amplitude and phase modulations at nanometer scale for the reconstruction of high resolution and low noise images.”

Dr. Jie Gao also explains, “Our unique wavelength-multiplexed method by encoding additional phase shifts into the holograms and introducing tilted incident angle illumination ensures the reconstruction of almost all visible colors, including not only red, green and blue colors but also their secondary colors of cyan, magenta, yellow and white.”