Optics through the use of Metalens

Optics through the use of Metalens

'In the near future, big microscopes and telephone lenses will be outdated. Researchers from the Harvard School of Engineering and Applied Sciences produced planar metalens which has ultra-thin arrays of tiny wave guides that will bend light as it passes. These metalens were made of Titanium Dioxide and can focus to any visible wavelength of light and can resolve little structures as small as 400 nanometers. The senior author of their paper, Federico Capasso, stated in an interview that “This technology is potentially revolutionary because it works in the visible spectrum, which means it has the capacity to replace lenses in all kinds of devices, from microscopes to cameras, to displays and cell phones.” He also stated that “In the near future, metalenses will be manufactured on a large scale at a small fraction of the cost of conventional lenses, using the foundries that mass produce microprocessors and memory chips.” The advantages in using metamaterials are plenty. First is that these lenses are easy to reproduce and are scalable. The titanium dioxide is already available in the present industry, could confine light, and it is non-toxic. These metalens are easier to produce which only needs one step unlike other lenses which needs precise techniques to perfect them. This new device can further improve wearable optics since it is light and flexible. Want to know more about this awesome device? Follow this link!

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