Dye laser medical equipment

Biologists usually use fluorescent dyes or fluorescent proteins to track the location of cells. By replacing them with micro-lasers, scientists can track more cells without forgetting which cell is which. This is because the light produced by each laser only contains one wavelength. In contrast, dyes produce multiple wavelengths of light in parallel, which means that people can't accurately distinguish the light of four or more different dyes, and the colors of dyes become too similar. On the contrary, researchers have now proved that it is possible to generate thousands of lasers, each with a slightly different wavelength, and these lasers can be distinguished with great certainty.

The new laser exists in the form of tiny disks, which are much smaller than the nuclei of most cells. They are made of semiconductor quantum well materials to provide the brightest laser emission and ensure that the color of the laser meets the requirements of the battery. Although lasers have been placed in cells before, the early experiments occupy more than 1000 times of the cell volume and require more energy to work, which limits their application, especially for tracking immune cells into local inflammation or monitoring the spread of cancer cells through tissues.

As a means of stimulation, variation, combustion and vaporization in organisms, laser has achieved good results in practical applications in medicine and agriculture. In the field of communication, the optical cable that transmits signals through the laser column can carry the information carried by 20,000 telephone copper wires; In addition to military communication, night vision, early warning and ranging, various laser weapons and laser-guided weapons have also been put into use.

When they began to study topological insulator lasers, no one believed that this was possible, because the known topological concepts were limited to those systems that did not have and could not have gain. But all lasers need gain. So topological insulator laser is contrary to everything known at that time. In fact, VCSEL can combine theory and experiment to obtain stronger and more efficient laser. Therefore, this result paves the way for the application of many future technologies, such as medical equipment and communication.