Discovery of a New Type of Light

Physicists have discovered a type of light that does not adhere to existing laws regarding angular momentum and could transform our understanding of electromagnetic rays, making optical communications faster and more secure. Angular momentum is a vector quantity used to express the motion of rotating systems. According to Science Alert, one method of measuring the radius of light is through its angular momentum, which indicates the degree of rotation of light. The report adds that it has been assumed until now that in all states of light, angular momentum is an integer multiple of Planck's constant, which estimates the scale of quantum effects. However, new research indicates that there exists a new form of light with half the angular momentum value. A group of scientists from Trinity College Dublin in Ireland has shown that light can have a completely different form. According to Engadget, the scientists passed light through a crystal and then directed it into a hollow screw-like cylinder. They then created a device to measure angular momentum simultaneously as light passes through the crystal and as it passes beside it. In the second case, the obtained number was exactly what was expected, a multiple of Planck's constant, but in the case where light passed through the crystal, the angular momentum value was halved. One of the researchers in this field states, 'A light beam is characterized by color, wavelength, and angular momentum, which is less understood. Angular momentum indicates how much an object is rotating. A light beam, although it travels in a straight path, can also rotate around its axis. Therefore, when light reflects off a mirror and hits the human eye, each photon slightly twists the eye.' This discovery is exciting not only because a completely new type of light has been discovered, but also because since the 1980s, theoretical physicists have predicted that quantum mechanics would allow for the existence of particles with angular momentum less than expected, a topic that has now been proven. Its greatest impact, apart from transforming our understanding of light, is that it provides information that can increase speed and security in fiber optic networks, enabling faster and more secure internet communications. Another researcher in this field states, 'The subject of light has always been one of the favorite topics of physicists. At the same time, it is one of the topics that has been very well understood. This discovery is a milestone in physics and in the world of science in general.' The results of this research have been published in 'Science Advances.'