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The maser can use small noise to amplify tiny radiation traces, allowing it to be used to measure weak signals in astronomy and to communicate with distant missions, such as NASA's Voyager detector. . But these applications usually require cryogenic cooling. In some cases, microwave devices may be more useful than lasers because microwaves can pass through certain materials while visible light does not. The latest installation was developed by a physicist at Imperial College London, England, which now produces continuous lasing beams at room temperature. The setup of this instrument involves the use of a laser to illuminate a set of devices consisting of diamond, sapphire and copper to produce microwave radiation. The sensitivity of existing microwave amplifiers is limited by background noise. David Awschalom, a physicist at the University of Chicago in Illinois who did not participate in the study, pointed out that this latest technology "reduces the noise of these amplifiers while allowing them to operate at room temperature." He said: "This work is very exciting." The research is based on a system built by researchers from the same team in 2012. The device also works at room temperature, but it can only generate exciting microwave pulses, which are not useful for continuous beams. The team solved this problem by replacing the key components of the device called "gain media." The first device uses an organic molecule called pentacene that degrades over time. In the new instrument, the researchers inserted a small diamond that was created under special conditions that is more stable and produces uninterrupted radiation. The researchers reported the findings in the March 21 issue of Nature. Liu Renbao, a physicist at the Chinese University of Hong Kong, China, said that the latest maser is still only a proof of principle, and that it needs to improve its energy and stability to match existing equipment. But Liu Renbao said that by making cheaper and more convenient equipment, it can benefit the current field of low-temperature amplifiers. In addition, Liu Renbao pointed out that the use of a characteristic of the diamond used by the maser, namely the so-called "nitrogen-vacancy center", means that it may also use these defects in quantum technology. Find the app
Diamond paves the way for the first practical microwave laser: it can work at room temperature or in quantum fields
Before the advent of the laser, scientists used the maser, which is the microwave "cousin" of the optical laser. However, although lasers are widely used in many fields from telescopes to medicine, masers have long been able to suffer in shadows because they can only work in ultra-low temperatures or vacuum. Today, physicists have used diamond to develop a maser that can operate under normal conditions. In the 1950s and 1960s, scientists developed masers and lasers, both of which were able to generate high-intensity electromagnetic waves.