Bilibili held an exciting event called "Bilibili Super Science Night". At this event, Chu Junhao, an academician of the Chinese Academy of Sciences, showed the audience a series of amazing optical stealth methods. He called these methods not magic, but scientific methods. According to him, the Harry Potter Invisibility Cloak of the future will become our everyday item. Let's take a look at how Academician Chu Junhao demonstrated these stealth techniques. In the video at the scene, Academician Chu Junhao asked the staff to hold up a panel. At the beginning, we could see the lower body of Academician Chu Junhao through this panel. But when the panel is rotated 90 degrees, his lower body seems to disappear, and only the stage scene behind him can be clearly seen. How? It turned out that Academician Chu Junhao's "stealth technique" used a magical material called "cylindrical grating". This material consists of rows of tiny, cylindrical-convex lenses that compress the object behind them into thin strips as light passes through. When the number of convex lenses is large enough, the object will be broken down into countless identical thin strips, so that people cannot see the object, and the effect of "stealth" is achieved.
In addition to the use of cylindrical grating, Academician Chu Junhao also demonstrated other stealth methods. One way to do this is to use two substances with similar refractive indices, and by placing an object between the two substances, the light rays will be refracted at the junction of the two substances, making the object visually appear to have disappeared. Another method is to use the reflection imaging principle of the plane mirror, by adjusting the angle and position, the object can also achieve the stealth effect. Through this amazing showcase, we can see that the power of science is limitless. The optical stealth method demonstrated by Academician Chu Junhao has aroused people's infinite reverie about the future development of science and technology. Imagine what the world would be like if each of us had such stealth technology? However, in addition to the convenience and possible applications brought about by technological developments, we also need to consider the social and ethical implications of stealth technology. If everyone was free to be invisible, criminals would not be traced and personal privacy would not be protected. Therefore, while using stealth technology, we also need to put in place relevant laws and regulations to ensure that the development of technology can benefit humanity and not bring negative impacts.
In general, Academician Chu Junhao's presentation at the "Bilibili Super Science Night" brought us endless imagination. The research and application of optical stealth methods will bring more possibilities for the future development of science and technology. But we also need to recognize that as technology evolves, we need to think about how to use it appropriately for the benefit of humanity as a whole, rather than getting caught up in moral and ethical dilemmas. Finally, I would like to ask you a question: what do you think about optical stealth technology? What changes do you think it can bring to our lives? Please leave your opinion in the comments. The "invisibility cloak" may no longer be a dream in science fiction. Academician Chu Junhao believes that "stealth" can be achieved by using the refractive index of the material, for example, the refractive index of borosilicate glass and glycerol is similar, and when the object made of borosilicate glass moves in glycerin, it can be "invisible". This technology is expected to be used in everyday life, such as designing invisible rooms and invisible hearing aids for better privacy. With the continuous development of "stealth" technology and "metamaterials", the imagination of "stealth" in science fiction works is expected to become a reality. The "stealth technique" displayed by Academician Chu Junhao aroused different opinions among netizens.
Some people are excited and looking forward to the future of science and technology, and think that wearing an invisibility suit may not be far off. This kind of wild imagination will change our lives, making people curious and looking forward to it. People imagine the arrival of the era of national invisibility, and are full of illusions and hopes for the future. On the other hand, there are also concerns about stealth technology. Fears that criminals may use stealth technology to carry out criminal activities, and concerns about the safety hazards of stealth clothing have also emerged among netizens. Both expectations and worries reflect people's complex mentality towards the development of technology. The rapid development of science and technology has brought us convenience and imagination, but it has also brought many problems and risks. While pursuing scientific and technological progress, we also need to balance the relationship between science and technology and society, and maintain a prudent attitude towards science and technology. For the application of stealth technology, we should clarify the rights and responsibilities it gives to people, and at the same time strengthen the supervision and legal protection of the abuse of stealth technology. The development of stealth technology is a multifaceted issue, involving many fields such as technology, ethics, and law. In the process of advancing the research and application of stealth technology, efforts and cooperation from all sides are required.
Scientists, governments, the public and other parties should participate in regulating and discussing the development direction and application scope of stealth technology to ensure that the progress of science and technology can truly benefit mankind. Finally, we can think about a question: what is your attitude towards the development of stealth technology? What do you think are the potential application scenarios and risks of stealth technology? Feel free to share your views and thoughts in the comment section. Junhao Chu, a male scientist born in Yixing, Jiangsu Province, is an expert in infrared physics, semiconductor physics, and devices. As an academician of the Chinese Academy of Sciences, he is a researcher at the Shanghai Institute of Technical Physics, Chinese Academy of Sciences, and also serves as the dean of the School of Science at Donghua University. Junhao Chu has rich experience and in-depth exploration in the research of infrared optoelectronic materials and devices. He is engaged in the study of the physics and devices of the narrow bandgap semiconductor material Mercury CdTe (HgCdTe) and ferroelectric thin films for infrared detectors. By integrating the reports of Chinanews and Red Star News, we can have a more comprehensive understanding of Chu Junhao's scientific research achievements and contributions. Chu Junhao, as an internationally renowned infrared physicist, has played an important role in promoting the development of infrared optoelectronic technology.
Infrared technology has a wide range of applications in military, security, medical, energy and other fields. However, the development of infrared technology is inseparable from the support of high-performance infrared detectors and devices. Chu's research revolves around the materials and devices of infrared detectors, with a focus on the narrow bandgap semiconductor materials mercury cadmium tellurium (HgCdTe) and ferroelectric thin films. These materials have important application value in the field of infrared optoelectronics, which can achieve efficient infrared detection and image transmission. Chu Junhao has made many important breakthroughs and innovations in the research of these materials, and has made great contributions to the development of infrared technology. As a scientist, Chu Junhao is not only committed to research, but also pays great attention to education. As the dean of the School of Science of Donghua University, he has played an important role in cultivating and guiding young scientific research talents. As an excellent tutor, Chu Junhao not only imparts scientific knowledge and technology to students, but also pays attention to cultivating students' innovative thinking and practical ability. He motivates students to actively participate in scientific research projects and develop hands-on and problem-solving skills. Chu Junhao's educational philosophy is to "cultivate scientists with innovative spirit and practical ability", and he hopes to cultivate more outstanding scientists and engineers through the combination of education and scientific research.
Chu Junhao's scientific research achievements have been widely recognized and praised. His research achievements in infrared optoelectronic materials and devices have been published in several academic journals, and he has received a number of scientific awards and honors at home and abroad. His research not only has a high influence in the academic community, but also plays an important role in promoting engineering applications. His breakthroughs and innovations have provided new ideas and methods for the development of infrared technology, which has helped to improve the performance and reliability of infrared detectors and devices. In short, as an infrared physicist and semiconductor physics and device expert, Chu Junhao has made important contributions to the research of infrared optoelectronic materials and devices. He has made many important breakthroughs and innovations in the research of narrow bandgap semiconductor materials and ferroelectric thin films, which have provided new ideas and methods for the development of infrared technology. At the same time, as an excellent educator, Chu Junhao pays attention to cultivating students' innovative thinking and practical ability, and has made positive efforts to cultivate more scientists and engineers. In the future, we look forward to Chu Junhao to continue to make more achievements in the field of infrared physics and promote the development of infrared technology. Do you know anything about infrared technology? In which areas do you think infrared technology has a wide range of applications?
What challenges do you think still faces in the development of infrared technology? Feel free to leave a comment to share your views and ideas.