Researchers present anti-reflective coating that blocks waves of many types

Phys.org  July 14, 2022 An international team of researchers (Austria, France) has developed a method that allows the calculation of a tailor-made anti-reflective structure which can be used to design an additional layer to the medium only partially permeable to a wireless signal so that the entire signal can be channeled through the medium without reflections. To determine the anti-reflective structure they sent the waves through the medium and measured exactly in which way these waves are reflected by the material. Using a mathematical technique they calculated the corresponding compensating structure so that the combination of both media allowed the […]

Bursting the clouds for better communication

Phys.org  October 18, 2018 Researchers in Switzerland have developed a laser that heats the air over 1,500 degrees Celsius and produces a shock wave to expel the suspended water droplets sideways. This creates a hole a few centimetres wide over the entire thickness of the cloud. The laser beam should be kept on the cloud and the laser that contains the information should be sent at the same time. It then slips into the hole through the cloud and allows the data to be transferred. This “laser cleaner” is currently being tested on artificial clouds that are 50 cm thick […]