Lenses are used in a wide range of applications from eyeglasses, optical telescopes, photographic and camera sensing devices to mobile phones, endoscopes and imaging systems. However, due to the refractive index of optical materials, the volume is usually thicker. Moreover, the refractive index of optical materials will vary with the wavelength of light changes, resulting in chromatic aberration, the lens in full-color image applications are therefore greatly limited.
Metasurfaces are miniaturized optoelectronic components that are designed through the optical design of electromagnetic wave characteristics such as phase, amplitude and polarization in subwavelength scales. Past research has successfully used the metamaterial to display a flat meta-lens, which proves that the imaging ability of the metamagic lens is superior to the currently widely used objective lens. However, the design method still faces several important problems at the practical application level, such as the chromatic aberration caused by dispersion.
This research achievement is one of the important progresses in the field of international nano-optics and optoelectronics. It is also of great help to the future development of planar optical components that are light, thin and multi-purpose.