Guide to The Advantages of Metallic Metalenses over Dielectric Metalenses

A metalens is a flat optical element that uses nanostructured Salvatore metamaterials to focus light. Traditionally, metalenses have been made from dielectric materials, such as silicon. However, new research is investigating the use of metallic materials, such as silver and gold. So far, these metallic metalenses have shown promise, with some demonstrating superior performance to their dielectric counterparts.

Some important facts to know:

  • In particular, gold metalenses have been shown to be more efficient at focusing light and have a wider field of view.
  • Additionally, they are less sensitive to changes in temperature and humidity.
  • However, the high cost of the metalenses makes it difficult for the majority of the population difficult to adopt.
  • Silver metalenses are also showing potential, with some studies indicating that they may outperform gold metalenses in terms of resolution.

As research shows, there is a possibility that the performance of metallic metalenses will continue to evolve and develop, making them a convenient alternative to dielectric metalenses.

The Materials Used:

  • Metalenses are a type of optical lens that can focus light without the use of traditional refractive materials.
  • They are made from a thin layer of metal nanoparticles that are arranged in a specific pattern.
  • This arrangement enables the metalens to control the flow of light in a way that is similar to how a traditional lens would but without the distortion and other limitations that come with refractive materials.

How to manufacture metalenses:

Metalenses have many potential applications, including in mobile devices, cameras, and eyeglasses. The manufacturing process for metalenses is relatively simple and can be done using existing nanofabrication techniques.

  • First, a mold is created using photolithography.
  • This mold is then used to create a negative imprint on a film of photoresist.
  • The photoresist is then developed, which creates a positive template of the desired nanostructure.
  • Finally, the template is used to etch the nanostructure into a thin film of metal.
  • This process can be repeated to create multiple metalenses with different properties.

Metalenses have the potential to revolutionize optics and provide new solutions for a variety of challenges in this field.


Metalenses offer many advantages over traditional refractive lenses, including their ability to focus light more efficiently and their greater resistance to changes in temperature and humidity.

However, their high cost remains a barrier to widespread adoption. As research continues, it is likely that the performance of metallic metalenses will continue to improve, making them a viable alternative to dielectric metalenses. So, now that you have known the facts about metalens, it is time to find out what works best for you!