A new method to control the launching direction of a miniature laser pointer

Researchers at Washington University in St. Louis have found a way to provide photons or light packets according to their instructions. The researchers used the generous energy state of a light domain to create photons in their laser pointer system so that they travel in a consistent pattern, clockwise or counterclockwise.

For all laser systems and applications to obtain a reliable strong photon signal and light pulse, the consistency of light propagation is very important. Laser alone is related to multi-billion dollar industrial applications, from information communication to medical laser hair removal. However, this consistency is also suitable for current and future applications in optical sensing devices, which can be used for aerosol detectors or cancer detection.

He is a professor of Edwin & Florence Skinner in the Department of Electrical System Engineering, and Ozdemir is a research assistant professor. Both of them are in the Faculty of Engineering and Applied Sciences, and their collaborators are at the Vienna University of Technology. Stefan Roth and Jane Welsch at Otto von Glick University in Germany have jointly explored a physical phenomenon called a special point, which forces photons to move clockwise. Or move counterclockwise instead of moving in random directions.

650nm 10mW Red Light Laser Pointer Pocket

The results of this research have been published in this month’s Proceedings of the National Academy of Sciences. This special point appears in the physical field when the complex eigenvalues ​​and eigenvectors merge or become the same. These are mathematical tools that describe a physical system. Regarding this special point as a complex and fascinating environment, there are often unpredictable and counterintuitive phenomena.

For example, in a paper published in the journal Nature in 2014, Yang and Ozdemir described the use of special points to increase the loss in the blue laser pointer system, but it makes the actual power increase, that is, if you want, the loss Will increase power. With the advancement of physics research, abnormalities will certainly promote some more counter-intuitive scientific research activities and results in the near future.

Yang and Ozdemir introduced the existence of a special point in the field of optics by adding two scatterers or nanotips of silica, which help to create a perfect scene, reminiscent of a special point. Using the nano-stage system, the Ph.D. went to Bloomberg to adjust the distance and relative size of the scatterers, increase the disturbance of the microseismic cavity in the optical field, and call out a special point. He was also the number one in the 2014 “Science” magazine paper. One author. Therefore, they have a controllable system.