Russian physicists have created an element for photonic computers - VIDEO PDF Print E-mail
Monday, 24 August 2015 14:25
A theoretical physicist at Moscow State University (MSU) and the Moscow State University of information Technologies, Radio Engineering and Electronics (MIREA) Michael Tribelsky together with colleagues from France and Spain have created a miniature dielectric sphere with a high refractive index and a low coefficient of radiation attenuation. Working scientists can be used as a constructive element in the computers of the future, not based on electronic, and photonic technologies. The results of their research published in the journal Physics Scientific Report. Scientists Develop a silicon bead diameter of two centimeters, which has a narrow resonance lines associated with excitation of vibrations of its polarization. Each line corresponds to the excitation of a certain type of vibrations and has a well defined dependence of the intensity of the reflected radiation on the angle of the incident beam. Waves in the resulting radiation interfere with each other, and you can manage this process with the help of specific excitation wavelength of the incident radiation. This allows to reallocate the radiation in the desired direction. "Experimental beauty of this work is that the phenomena occurring at the nanoscale in the optical range, it was possible to simulate in the centimeter range by means of microwave radiation - the same one which is heated soup in the microwave. Suffice it to say that the experimenter was able to isolate the useful signal to the background of interference, the amplitude of which was three thoUSAnd times more useful, "- said Tribelsky. The need to switch from one to the other electronic technology, in particular, photonic, have been linked to the achievement of computers working based on the first technology, the physical limits of its capabilities. Alternatively, increase processing speed, scientists have proposed using ultrafast optical systems that could replace the circuitry. To do this, scientists have searched for materials that could be held manipulation of scale, smaller than the wavelength of the radiation. This leads to some problems, in particular to damping and scattering the incident electromagnetic radiation of small bodies. Russian scientists with foreign colleagues managed to solve this problem. Its theoretical solution in 1984 Tribelsky suggested in his article in the Journal of Experimental and Theoretical Physics, which proved the existence of a new type of light scattering (compared to the previously known Rayleigh) and practical implementation of the idea was only in 2015.