The "pillar fund tie" nanoparticle array in the figure produces an adjustable motion under the influence of electromagnetic forces. Recently, a team of researchers at the University of Illinois at Urbana-Champaign developed a novel adjustable nano-antenna that uses a plasma field controlled by an electronic scanning microscope to enhance mechanical motion, change the gap between nano-antennas, and rearrange them. . This paves the way for the development of new plasma light systems in the future. Related papers were published in the recent Nature News. Plasma nano-antennas have nano-textured surfaces that can confine and enhance electric fields in the deep subwavelength range and are showing more and more advantages. "The nano-textured surface is like a preprogrammed program. After the incident light interacts with the surface, the properties of the light will change. Our method is to do this," said Gimany Tucson, associate professor of mechanical science and engineering at the institute. With the nanoarray structure already prepared, the array is adjusted under the scanning electron microscope to achieve further reorganization of the plasma optical properties. Therefore, one can decide the desired nanostructure to change the light after it is made, rather than before." According to a recently reported physicist's organization network, researchers have developed nano-antennas called columnar-tie nano-antenna (p-BNA) array templates, each of which is about 250 nanometers in diameter, made of gold into a bow tie column, under the “bow tieâ€. The pad has a 500 nanometer tall glass column. The size of a single p-BNA gap can be scaled down by approximately 5 nanometers (four times less than what can be achieved with current conventional beam lithography techniques). Experiments have shown that an electron beam emitted by a standard scanning electron microscope (SEM) allows one or more p-BNA subarrays to deform at a speed of 60 nanometers per second. Dr. Brian Locksworth, Ph.D., the author of the paper's first author and electric power and computer engineering, said: "We observed that under the excitation of the electrons, the plasma mode drove a significant deformation of the nano-antenna, which caused a gap between the gold particles. The difference in force at the level of Naoxiu (10's negative 9th cow).†The team believes that the p-BNA column height to thickness ratio is 4.2, which is relatively high, plus a large amount of heat around it, which makes them able to Obeys the tiny difference in force caused by the electron beam and produces a movement. The researchers pointed out that the importance of this study has three aspects: First, the adjustment of the light (plasma) response of the nano-antenna goes deep into the level of a single antenna; the second is to provide unique spatially-located addresses for sensing and nanoparticle manipulation. Nano-photonic devices; third is to provide a nano-scale platform for the study of mechanical, electromagnetic and thermal phenomena. "Our manufacturing process is an innovative approach," said the research team's Abu Dbuya, "The manufacture of plasma nano-antenna structures under scanning electron microscopy (SEM) overcomes the similar deficiencies of traditional lithographic techniques. The nano-antenna gap is controllably reduced by 5 nanometers. This new manufacturing technology also opens up new avenues for research in many other fields.†(Chang Lijun)
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