The laser is filtered through a crystal to convert this light into other wavelengths that the researchers need. This light is then reflected by a series of mirrors, creating ultrashort bursts of light at new wavelengths. Yes, objects can be levitated using a laser. Light consists of photons, which exert a force called radiation pressure. This force is due to the interaction between electromagnetic radiation and matter. It can be absorbing, reflective or both. Usually lasers are used to heat materials, but you can also use lasers to cool materials. Laser cooling works by reducing the number of atoms or molecules. Since photons also have momentum, atoms or molecules moving in the opposite direction to the green laser pointer beam can be broken down by the laser, reducing the speed of the atoms/molecules. You can think of it as two billiard balls touching each other and decelerating each other due to momentum transfer.
This form of matter is called plasma and is the so-called fourth state of matter. By focusing a high-power laser on a "fusion" target, it can turn into plasma and cause an implosion. This forces fusion materials to fuse and release enormous amounts of energy. Although we do this with a much shorter range for home laser pointers than for more strenuous activities. A few extra features are required for long-distance use. For example, blue laser pointers are generally faster to collimate than red lasers. This ensures focus at greater distances, allowing you to get farther away from the target without losing accuracy.
Fiber lasers can also provide next-generation ultra-high-power devices that provide X-rays for many types of research, especially in the life sciences. The European X-ray Free Electron high power laser pointer (XFEL) is a large facility under construction in Germany expected to deliver X-rays at unprecedented intensities, and the UK is supporting the project. The researchers addressed this limitation by using an optical parametric oscillator, which converts conventional laser light to other wavelengths of light, which could be useful in certain research areas. An example is the study of molecular behavior.
