22 Jan

We all know that besides industrial applications, burning laser pointer technology has been widely used in many fields such as research, biomedicine and communications, which has played a great role in promoting the development of human science and technology.

Scientists have developed the world's first optoelectronic neuromorphic chip

green laser pointer

The research team from Princeton University in the United States has developed the world's first silicon photonic neuromorphic chip and has proven that it can speed up the operation nearly 2000 times, helping to promote artificial intelligence such as facial recognition, object recognition, natural language processing, machine translation Technical application development.

The research team etched each node of the new chip in the form of a mini circular waveguide into a silicon base, allowing light to circulate through it. When light is input to the node, the output of the laser working at the node threshold is modulated, and the output of the high power laser is fed back to the node, creating a feedback circuit with non-linear features. With regard to the extent to which this nonlinear behavior mimics neural behavior, researchers have demonstrated that its output is mathematically equivalent to a "continuous-time recurrent neural network." Researchers used a network of 49 photon nodes to simulate the neural network and used it to solve the mathematical problems of differential equations. They found that this silicon photon neuromorphic chip can compare the arithmetic speed up 1960 times.

The world's strongest X-ray laser to create a "mini black hole"

The strongest X-ray laser plays an important role in exploring the internal structure and function of matter, and scientists in other countries also explore more unknown fields in this field.

Researchers at Kansas State University were surprised to find that when they bombarded a single molecule with the most powerful X-ray laser in the world, a "mini-black hole" emerged. This intense laser destroyed molecules inside and out, leaving only a void, similar to a black hole in space. The researchers hope that this unexpected result may push the overall imaging technology for viruses and bacteria to develop and help scientists develop new drugs.

When a molecule is irradiated with Linac Coherent Light Source (LCLS), the molecule loses more than 50 electrons at 30 femtoseconds (in the trillionths of a second), causing it to explode. LCLS is commonly used for the imaging of biological individuals, including viruses and bacteria. The researchers hope that through the experimental results of this molecular black hole, we can make better use of this star laser pointer for more valuable experiments.

Lasers make electronic devices no longer dependent on semiconductor materials

Scientists from the University of California, San Diego, have developed a new type of microelectronic device that could be replaced by processors made from semiconductor materials in future PCs. Engineers have developed a light-controlled microelectronic device that contains a metamaterial surface made of gold nanotubes. By laser irradiation, the super-surface energy to produce high-intensity electric field.

The new microelectronic devices, which do not use semiconductor materials, may solve a difficult problem faced by modern microprocessors. The problem with processors that operate electronically depends on the fact that the electrons collide with atoms constantly, many of which may not be able to migrate to their destination - many electrons are lost during the processor's operation.

This new microelectronic device attempts to solve this problem by "mimicking" the old-fashioned vacuum tube - of course on a microscale. Mushroom-shaped nanotubes in the device form Metasurfaces on silicon wafers, both separated by a layer of silicon dioxide. When a low DC voltage is applied and a low-energy infrared 2000mw laser pointer is applied, this structure produces a high-intensity electric field that allows electrons to "migrate" freely.

New Laser Writing Technology Upgrades Graphene Structure

As we all know, graphene can be used to manufacture a variety of electronic, optoelectronic devices, more scientists predict that graphene will "completely change the 21st century," is likely to set off a worldwide revolution in disruptive new technology and new industries.

Researchers from Finland's Jyväskylä University and Taiwan, China, jointly found that laser-writing technology can change the two-dimensional structure of graphene carbon atoms into three-dimensional objects, and the graphene three-dimensional structure material has strong stability, Two-dimensional structure of different electrical and optical properties. The process application is similar to forging a metal into a three-dimensional form with a 3000mw laser pointer beam "hammer." Finally, through experiments and computer simulations, the author realizes that the graphene carbon atom two-dimensional structure to three-dimensional shape of the authenticity and its formation mechanism.

In nature, the structure is determined by nature, without exception, the structural characteristics of graphene determines the graphene has a thin and hard, good transmittance, thermal conductivity, high conductivity, structural stability, electron transfer speed and other characteristics. The industry believes that graphene in electronic applications, according to the number of layers can generally be divided into single-layer graphene, double graphene, less graphene and multilayer graphene. Because the excellent properties of graphene will be significantly reduced with the increase of the number of layers, beyond the multi-layer will not have the excellent performance of graphene materials, the application of graphene in the electronics upgrade will lose the advantage. The two-dimensional to three-dimensional structure of the upgrade graphene applications opened up a new direction of application.

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