Colloidal crystals are ordered arrays of particles that can exhibit a variety of interesting optical properties. However, the symmetry of these crystals often limits their applications. For example, crystals with a cubic symmetry cannot be used to create certain types of optical devices.

A team of researchers from the University of California, Berkeley, has now found a way to break the symmetry of colloidal crystals. The team's method involves using a laser to heat the crystals, which causes the particles to move around and break the crystal's symmetry.

The researchers say that their method could be used to create new types of optical devices, such as lenses and polarizers. The method could also be used to study the properties of colloidal crystals and other materials.

The team's findings were published in the journal Nature Communications.

How the method works

The researchers' method involves using a laser to heat a colloidal crystal. The laser light causes the particles in the crystal to vibrate, which eventually leads to the particles moving around and breaking the crystal's symmetry.

The researchers say that the key to their method is to use a laser with the right wavelength. The wavelength of the laser light must be close to the wavelength of the light that the particles in the crystal absorb. This allows the laser light to effectively heat the particles and cause them to move around.

The researchers say that their method could be used to break the symmetry of any type of colloidal crystal. The method could also be used to create crystals with new symmetries, such as crystals with a hexagonal symmetry.

Applications of the method

The researchers say that their method could be used to create new types of optical devices, such as lenses and polarizers. The method could also be used to study the properties of colloidal crystals and other materials.

For example, the researchers say that their method could be used to create lenses that can focus light in a specific direction. The lenses could be used in a variety of applications, such as microscopy and optical communications.

The researchers say that their method could also be used to create polarizers that can block light of a specific polarization. The polarizers could be used in a variety of applications, such as photography and sunglasses.

The researchers say that their method is a powerful tool that could be used to create new materials and devices with a wide range of applications.