Optical Spin-Hall Effect And Thermal Radiation Controlling By Using Metamaterial Atom Of Metal/Dielectric/Metal Structure

The development of how to deliver message to others or communicate with other people takes a very important part in the history of human beings.In ancient times,people could only transmit a simple piece of information by primitive means such as pigeons and flames,while they were inefficient and insufficient.Since the discovery of modern electromagnetic waves,mankind began to transmit information through radio with greatly improved efficiency.With the establishment of quantum theory in last century,electronics industry was developing quickly and laid a solid foundation for the rapid development of information technology today.We all know that the process of information transmission and processing is physical,and its carriers are mainly electrons and photons.The first computer came out as a big step forward for the information processing method with electrons as the main carriers.Since then,the rapid development of electronic integration technology has led us to the information age directly.The popularization of various electronic products such as personal computers and mobile phones has also provided the cornerstone for the development of emerging industries such as the Internet and artificial intelligence.The prospective development of information technology relies on the new generation of integrated chips with faster transmission speed,wider channels and advanced concepts.As the photon is the fastest information carrier under the theoretical framework of physics,exploitation on photonic integration is of great value.We know that according to the theory of wave-particle duality,the wavelength of electrons is much smaller than that of visible light,so integration of photons is much harder than that of electrons and leads to the backwardness of photon-integrated technology.Therefore,some new designs urgently need to be proposed based on fundamental physics.First consider the basic characteristics of light that light is wave.Because of the wave-like behavior of light,we can directly use the Huygens principle to describe the wavefront of light and its propagation behavior in space.If we have the ability to fabricate some specific micro/nano structures so that they can control the wavefront of light at a small scale,we can use this method to control the motion of photons and the energy distribution of the light field which will boost photonic integration technology.Previously,scientists proposed such as photonic crystals,metamaterials and other micro/nano structures for the construction of different systems to achieve the integration of photonic chips.On the other hand,with the rapid development of micro-fabrication technology in recent decades,a variety of micro-fabrication methods have been proposed and improved,allowing us to process micro/nano structures small enough for light manipulation from terahertz to optical frequency.In my work,I mainly use metal/dielectric/metal or similar structures as the structural elements that regulate the light field.Due to the presence of two layers of metal,coupling is easy to occur between layers and even local magnetic plasmonic resonance forms to provide a very effective means of controlling the light field at a small scale.Based on this structure,I conducted some researches during my Ph.D.and achieved some physical applications:1.We use the two-dimensional metal/dielectric/metal structure metasurface to control the geometric phase of circular polarized light to achieve plasmonic spin Hall effect and focusing,and realize surface plasmon holography in the near-infrared of 1064 nm.This imaging method can not only flexibly realize various holographic images,but also dynamically adjust the holographic image by interference between two kinds of circular polarized light.Moreover,this approach can be extended to a variety of bands and has many potential applications for dynamic coherent imaging in future.2.The realization of controlling plasmonic beams based on the optical spin Hall effect of one-dimensional metamaterial consists of metal/dielectric/metal nanohole structures.The accelerated motion and bremsstrahlung of charged particles in curved spacetime are simulated by adjusting the geometric phase of the metallic nanopore structure.Furthermore,through the principle of generalized covariant transformation in general relativity,a series of one-dimensional metamaterials with generating same plasmonic beam can be designed.Then we can further understand the essence of this transformation which is equivalent to describe same motion in different inertial reference systems.Under this expression,we can extend it to the accelerated coordinate system under the approximate conditions,and analogy to the transformation of the inertial coordinate system to the Rindler coordinate system,we can experimentally generate the Rindler beam.3.The metal/medium/metal kind of metasurface can also be used to regulate thermal radiation.The photonic crystal is realized through periodically modulating the metal/dielectric/metal waveguide mode with periodically designed metallic structure.In the experiment,we can flexibly control the polarization,intensity,angle and frequency of thermal radiation through the band and dispersion of this metasurface photonic crystal.I will conclude my work at the end of my essay.In view of the limitations of author's knowledge,the paper has inevitable omissions,please understand and correct.