It has been reported that the experimental results obtained with the Gemini laser in the center of the STFC laser device show for the first time that the reflection of laser light with an ultra-thin foil mirror moving at a speed close to the speed of light will increase the laser energy, which also proves that Einstein was in action in 1905. The special theory of relativity presented in the article "Electrodynamics" is published in the journal Nature Communication.
This experiment demonstrates that when a strong laser beam interacts with a dense electronic surface moving at a speed close to the speed of light, a momentum transfer occurs between the incident beam and the "mirror." By compressing the combined pulse in the time domain and shortening the wavelength of the reflected wave (and thus the energy becomes larger), this momentum transfer results in a significant increase in the peak power of the reflected light.
The experimental conditions that can observe this phenomenon are difficult to meet. A super-intensive laser is needed to ionize the target surface, and at the same time accelerate the dense packet electron (flying mirror), which exists only in a few femtoseconds. The second intense laser collides with the flying mirror in this period of time and is specularly reflected. Coupled with the need to use a solid target with only a few nanometers thick and a laser beam of sufficient strength to compare quality, you will get this slightly challenging experimental solution.
However, the collaborative research between the Max-Planck Institute of Quantum Optics in Garching, the University of Munich, the Queen's University of Belfast, and the Central Laser Research Institute (CLF) uses a two-beam Gemini laser and an ultra-thin foil target with a thickness of only 50 nanometers. The conditions required for this experiment were met. The researchers observed a downward shift in the wavelength of the laser beam, which was shifted down from 800 nm by about 60 nm, while the reflected pulse width was compressed from 50 femtoseconds to the order of hundreds of ns (1 sec for 10^-18 sec).
This experimental phenomenon not only proves Einstein's special theory of relativity, but also provides a new idea and method for producing high-intensity atomic laser. Attosecond laser is important in the field of ultrafast electron dynamics and atomic scale basic physics research. Needs and applications.
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