Scientists have overcome the diffraction limit through teragertsovoy wave
August 6, 2008, 7:20 pm
Japanese scientists succeeded in developing technology shooting images with a spatial resolution, exceeding the diffraction limit teragertsovuyu using electromagnetic waves with a frequency of about 1 TGts. Zahvatyvaya limited electromagnetic field (relevance to the light of near field (near-field light)), posed for the diaphragm, less than the size of the wavelength, the scientists of Science and Technology Agency of Japan and the Japan Institute of Physical and Chemical Research reached a spatial resolution of 9 microns with through electromagnetic wave length of 214, 6 microns. This is made possible by combining in a single semiconductor device diaphragm, blizhnepolnogo sensor and detector. Teragertsovaya electromagnetic wave is located between visible light and other waves and passing through the material does not transmit light. When comparing the electromagnetic waves with electrons, photons teragertsovaya wave energy is about millielektronvolta, which is comparable to the electron-excited state semiconductor or superconductor. Teragertsovye waves are of great length, is about 100-500 microns. Without technology dim light field may simply recreate the image spatial equivalent of wavelengths. Fodder fact did not exist any commercial detector with sufficient sensitivity. At this time built a device that connects components for measuring blizhnepolnogo light in a semiconductor chip with GaAs/AlGaAs heterostructures. Blizhnepolny sensor is located directly behind the diaphragm 8 microns in diameter. After inclusion in the scheme of distribution of the electromagnetic field sensor blizhnepolnogo light in the diaphragm, which otherwise localized in one area can be expanded spatially. The two-dimensional electronic gas, which is located between GaAs and AlGaAs, located at 60 nm and below the sensor used as a detector. Detector measures the intensity distribution of electromagnetic wave, based on changing the two-voltage electron gas. By doing so, improved sensitivity. Identified properties will enable the use teragertsovye waves for the study of food, non-destructive testing of structures and biological tests. The device also has the advantage that the electromagnetic waves interact only with blizhnepolnym light.