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    Home > Deng Shuiquan research group and collaborators of Fujian Institute of physical composition, Chinese Academy of sciences have made important progress in the study of nonlinear optical atom response theory

    Deng Shuiquan research group and collaborators of Fujian Institute of physical composition, Chinese Academy of sciences have made important progress in the study of nonlinear optical atom response theory

    • Last Update: 2018-11-28
    • Source: Internet
    • Author: User
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    Nonlinear optical material is one of the important inorganic photoelectric information functional materials, and it is an indispensable key material in laser technology and modern military technology Fujian Institute of physical structure, Chinese Academy of Sciences, has been in the world's leading level in the academic research and industrialization of nonlinear optical crystals As early as the 1980s, two important nonlinear optical crystals BBO and LBO were found in Fujian Institute of physical composition, which are widely used in the laser output of visible and ultraviolet bands, and are known as "China brand" crystals in the world However, since the establishment of anion group theory of nonlinear optical materials in 1978, there has been no substantive breakthrough in the theoretical research of nonlinear optical materials for more than 40 years, resulting in the lag in the research and development of new practical crystals At present, the theoretical research based on the concept of functional primitives and materials genomics is a new paradigm to explore the structure-activity relationship of materials However, there is no mature scheme to find the origin of nonlinear optical phenomena based on the basic composition and structure of materials Under the leadership of academician Hong Maochun, Deng Shuiquan, the State Key Laboratory of structural chemistry, Fujian Institute of physical architecture, supported by the strategic leading science and technology program of the Chinese Academy of Sciences, the 973 Program of the Ministry of science and technology, the national key R & D program of the Ministry of Science and technology, and the National Natural Science Foundation of China In this paper, a partial response theory method with universal applicability is proposed, and an atom scale nonlinear optical atom response theory is established As an example, using the first principle calculation and theoretical model analysis, the research group has studied the deep UV nonlinear optical crystal lic2po4 It is found that the main sources of the double frequency effect are the metal central ion group cso6 and lio4, rather than the traditional non-metal central group PO4 The results show that the occupied o-2p and cs-5p orbitals, as well as the non occupied cs-5d and li-2p orbitals all contribute to the frequency doubling effect The theory of nonlinear optical atom response is a great breakthrough in this field since the foundation of anion group theory This theory reveals the polarizable characteristics of the orbit and the important role of the long neglected non occupied orbit in the frequency doubling effect It interprets the nonlinear optical frequency doubling effect from a new perspective, which is of great scientific significance to understand the micro mechanism of nonlinear optical materials and the function oriented material design The research results were published on angelw Chem Int ed (2018, 57, 3933) and selected as VIP articles by the magazine Researcher Deng Shuiquan and Professor Myung Hwan whangbo from North Carolina State University are the corresponding authors.
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