Cadmium dizinc diborate （CdZn2B2O6） single crystals have been grown for the first time. The crystal structure of CdZn2B2O6 is the same as that of the Cd3Zn3B4O12. The x-ray diffraction, infrared and Raman spectra, d...Cadmium dizinc diborate （CdZn2B2O6） single crystals have been grown for the first time. The crystal structure of CdZn2B2O6 is the same as that of the Cd3Zn3B4O12. The x-ray diffraction, infrared and Raman spectra, differential scanning calorimetry analysis and density indicate that the physical and chemical properties of both crystals are very similar. Especially, the nonlinear optical coefficients of CdZn2B2O6 and Cd3Zn3B4O12 crystals are 2.6 and 2.4 times as large as that of KH2PO4 crystal respectively. Chemical etching experiments indicated that these crystals are very stable in neutral solution and not hygroscopic in air at room temperature.展开更多
In recent years, motivated by the discovery of deep-UV（wavelengths below 200 nm） nonlinear optical（NLO） phosphates, Ba3P3O（10）X（Cl, Br）, phosphates have entered into a passionate research era. In this review, ...In recent years, motivated by the discovery of deep-UV（wavelengths below 200 nm） nonlinear optical（NLO） phosphates, Ba3P3O（10）X（Cl, Br）, phosphates have entered into a passionate research era. In this review, recently discovered phosphate materials containing different anionic groups, i.e., isolated [PO4], [P2O7] dimer, [P3O（10）] trimer, and [PO3]∞ chain, are summarized, including their syntheses, structures, NLO performances and properties. Especially phosphates with short absorption edges in the deep-UV region and good SHG efficiency are introduced in detail. We hope that this work will present a clear view of the crystal chemistry of phosphates and promote the discovery of new high-performing second-order NLO materials to meet the urgent needs in laser science.展开更多
β-LiZnPO4 single crystal was successfully synthesized via hydrothermal method.It crystallizes in the trigonal space group R3 with a = b = 13.6490 A, c = 9.1123 A, γ = 120.00° andZ = 18. Structure of the crystal...β-LiZnPO4 single crystal was successfully synthesized via hydrothermal method.It crystallizes in the trigonal space group R3 with a = b = 13.6490 A, c = 9.1123 A, γ = 120.00° andZ = 18. Structure of the crystal is constructed by LiO4, ZnO4 and PO4 tetrahedral units to form athree-dimensional （3D） framework. The crystal has a high transmission ranging from 350 to 800nm with UV cut-offedge at 220 nm. The nonlinear optical efficiency of the as-prepared β-LiZnPO4is about 1.2 times as large as that of KDP （KH2PO4） standard. Additionally, band structure anddensity of states calculations for β-LiZnPO4 were performed using the total-energy code CASTEEbased on density functional theory （DFT）.展开更多
Nonlinear optical(NLO)crystals have been playing an increasingly important role in laser science and technology.The NLO crystals used in the middle infrared(mid-IR)region,compared with the NLO crystals in the other wa...Nonlinear optical(NLO)crystals have been playing an increasingly important role in laser science and technology.The NLO crystals used in the middle infrared(mid-IR)region,compared with the NLO crystals in the other wavelength regions,are still not good enough for the application of high-energy laser.The main defect is that their laser damage thresholds(LDT)are low.Chinese scientists have made a lot of important contributions to the UV and visible NLO crystals.In the last decade,they also did a lot of work on the mid-IR NLO materials.The main purpose of these researches is to increase the LDT and simultaneously balance the other properties.This paper presents a brief summary of their research progress in this topic on three types of materials:chalcogenides,oxides,and halides.The emphasis is put on the design strategy and quality control of the crystals.展开更多
Deep-ultraviolet(deep-UV)nonlinear optical(NLO)crystals are of current interest because they play an indis-pensable role in modern scientific equipment.Searching these crystals was traditionally limited toπ-conjugate...Deep-ultraviolet(deep-UV)nonlinear optical(NLO)crystals are of current interest because they play an indis-pensable role in modern scientific equipment.Searching these crystals was traditionally limited toπ-conjugated systems,such as borates and carbonates.In 2019,our group reported two non-π-conjugated sulfates as new sources of deep-UV NLO crystals for the first time.In this mini review,we provide a comprehensive overview of the recent development of non-π-conjugated NLO sulfates with deep-UV absorption edge in aspect of synthesis methods,crystal structures,thermal stability,and optical performance.Besides,we conclude the crucial structure-property relationships,and further give some prospects for exploring non-π-conjugated NLO sulfates with deep-UV absorption edge with high thermal stability,enhanced second-order NLO effects,birefringence,etc.We believe that this mini review will not only facilitate researchers to design superior non-π-conjugated NLO sulfates with deep-UV absorption edge but also shed useful insights on the explorations of other non-π-conjugated deep-UV NLO crystal systems.展开更多
Nonlinear optical(NLO)materials as a crucial part of the laser science have attracted increasing attention from researchers because of their wide applications in information storages,modern science and technologies,et...Nonlinear optical(NLO)materials as a crucial part of the laser science have attracted increasing attention from researchers because of their wide applications in information storages,modern science and technologies,et al.Based on the anionic group theory,theπ-conjugated 6-membered rings(6-MRs),B_(3)O_(6)-typed structures have key contributions to the superior optical properties ofβ-Ba_(2)B_(2)O_(4)(β-BBO).In recent years,the organic coplanarπ-conjugated B_(3)O_(6)-typed structures have caught researchers'attention due to similar configurations to the(B_(3)O_(6))groups,which are the potential sources for expending the(B_(3)O_(6))groups with outstanding optical properties.Up to know,researchers have obtained many ultraviolet(UV)NLO crystals with excellent properties withπ-conju-gated B_(3)O_(6)-typed groups.Herein,these B_(3)O_(6)-typed groups could be divided into different categories according to the atoms constituting the 6-MRs:(H_(x)C_(3)N_(3)O_(3))^(x-3)(x=0-3)(cyanurate ion),(H_(x)C_(4)N_(2)O_(3))^(x-4)(x=2,3)(barbi-turate ion),(C_(3)H_(7)N_(6))^(+)(melamine ion),(C_(5)H_(6)ON)^(+)(4-hydroxypyridine cation),and(C_(4)H_(6)N_(3))^(+)(2-amino-pyrimidinium cation).In this review,we introduced the research advances of NLO materials withπ-conjugated B_(3)O_(6)-typed groups,and summarized the crystal structures,synthetic methods,optical performances,as well as the relationships between structures and properties.This work provided a clear perspective for understanding the coplanarπ-conjugated B_(3)O_(6)-typed groups with their optical functional properties and promote the searches to develop potential NLO functional crystals.展开更多
Nonlinear optical(NLO)crystals are key materials for solid-state lasers,which play an important role in modern science and technology.However,owing to the intrinsic limitation of functional building units(FBUs)in conv...Nonlinear optical(NLO)crystals are key materials for solid-state lasers,which play an important role in modern science and technology.However,owing to the intrinsic limitation of functional building units(FBUs)in conventional compounds,it is difficult to surpass the performance of existing materials.Therefore,it is necessary to continuously explore new NLO-active FBUs to overcome the recent stagnant situation.Recently,a lot of new FBUs were discovered as NLO-active units in different wavelength ranges.Their contributions are confirmed by the performance of corresponding crystals.In this review,newly identified NLO-active units and corresponding NLO crystals are summarized and discussed in terms of crystal structure,NLO performance,and structure-property relationship.One can find that the heteroleptic coordinated tetrahedra and organic π-conjugated planar groups are the main source of new FUBs that will be a research hotspot in further research work.This review concludes the feasible directions on the exploration of new NLO crystals to satisfy the urgent requirements.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 50590402.
文摘Cadmium dizinc diborate （CdZn2B2O6） single crystals have been grown for the first time. The crystal structure of CdZn2B2O6 is the same as that of the Cd3Zn3B4O12. The x-ray diffraction, infrared and Raman spectra, differential scanning calorimetry analysis and density indicate that the physical and chemical properties of both crystals are very similar. Especially, the nonlinear optical coefficients of CdZn2B2O6 and Cd3Zn3B4O12 crystals are 2.6 and 2.4 times as large as that of KH2PO4 crystal respectively. Chemical etching experiments indicated that these crystals are very stable in neutral solution and not hygroscopic in air at room temperature.
基金supported by the National Natural Science Foundation of China under Projects 91422303,21571020,and 21671023
文摘In recent years, motivated by the discovery of deep-UV（wavelengths below 200 nm） nonlinear optical（NLO） phosphates, Ba3P3O（10）X（Cl, Br）, phosphates have entered into a passionate research era. In this review, recently discovered phosphate materials containing different anionic groups, i.e., isolated [PO4], [P2O7] dimer, [P3O（10）] trimer, and [PO3]∞ chain, are summarized, including their syntheses, structures, NLO performances and properties. Especially phosphates with short absorption edges in the deep-UV region and good SHG efficiency are introduced in detail. We hope that this work will present a clear view of the crystal chemistry of phosphates and promote the discovery of new high-performing second-order NLO materials to meet the urgent needs in laser science.
基金funded by the National Natural Science Foundation of China(51575004)the General Program of Beijing Municipal Education Commission(KM201610009005)
文摘β-LiZnPO4 single crystal was successfully synthesized via hydrothermal method.It crystallizes in the trigonal space group R3 with a = b = 13.6490 A, c = 9.1123 A, γ = 120.00° andZ = 18. Structure of the crystal is constructed by LiO4, ZnO4 and PO4 tetrahedral units to form athree-dimensional （3D） framework. The crystal has a high transmission ranging from 350 to 800nm with UV cut-offedge at 220 nm. The nonlinear optical efficiency of the as-prepared β-LiZnPO4is about 1.2 times as large as that of KDP （KH2PO4） standard. Additionally, band structure anddensity of states calculations for β-LiZnPO4 were performed using the total-energy code CASTEEbased on density functional theory （DFT）.
基金This work was supported by the National Basic Research Project of China(No.2010CB630701)the National Natural Science Foundation of China(No.91022036).
文摘Nonlinear optical(NLO)crystals have been playing an increasingly important role in laser science and technology.The NLO crystals used in the middle infrared(mid-IR)region,compared with the NLO crystals in the other wavelength regions,are still not good enough for the application of high-energy laser.The main defect is that their laser damage thresholds(LDT)are low.Chinese scientists have made a lot of important contributions to the UV and visible NLO crystals.In the last decade,they also did a lot of work on the mid-IR NLO materials.The main purpose of these researches is to increase the LDT and simultaneously balance the other properties.This paper presents a brief summary of their research progress in this topic on three types of materials:chalcogenides,oxides,and halides.The emphasis is put on the design strategy and quality control of the crystals.
基金the National Natural Science Foundation of China(22122507,22193042,21833010,61975207,and 21921001)the Natural Science Foundation of Fujian Province(2022J02012)+2 种基金the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Y202069)the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-SLH024)Fujian Institute of Innovation(FJCXY18010201)in Chinese Academy of Sciences.
文摘Deep-ultraviolet(deep-UV)nonlinear optical(NLO)crystals are of current interest because they play an indis-pensable role in modern scientific equipment.Searching these crystals was traditionally limited toπ-conjugated systems,such as borates and carbonates.In 2019,our group reported two non-π-conjugated sulfates as new sources of deep-UV NLO crystals for the first time.In this mini review,we provide a comprehensive overview of the recent development of non-π-conjugated NLO sulfates with deep-UV absorption edge in aspect of synthesis methods,crystal structures,thermal stability,and optical performance.Besides,we conclude the crucial structure-property relationships,and further give some prospects for exploring non-π-conjugated NLO sulfates with deep-UV absorption edge with high thermal stability,enhanced second-order NLO effects,birefringence,etc.We believe that this mini review will not only facilitate researchers to design superior non-π-conjugated NLO sulfates with deep-UV absorption edge but also shed useful insights on the explorations of other non-π-conjugated deep-UV NLO crystal systems.
基金supported by the National Natural Science Foundation of China(Grant Nos.22222510,21975255 and 21921001)the Foundation of Fujian Science&Technology Innovation Laboratory(2021ZR202)Youth Innovation Promotion Association CAS(2019303).
文摘Nonlinear optical(NLO)materials as a crucial part of the laser science have attracted increasing attention from researchers because of their wide applications in information storages,modern science and technologies,et al.Based on the anionic group theory,theπ-conjugated 6-membered rings(6-MRs),B_(3)O_(6)-typed structures have key contributions to the superior optical properties ofβ-Ba_(2)B_(2)O_(4)(β-BBO).In recent years,the organic coplanarπ-conjugated B_(3)O_(6)-typed structures have caught researchers'attention due to similar configurations to the(B_(3)O_(6))groups,which are the potential sources for expending the(B_(3)O_(6))groups with outstanding optical properties.Up to know,researchers have obtained many ultraviolet(UV)NLO crystals with excellent properties withπ-conju-gated B_(3)O_(6)-typed groups.Herein,these B_(3)O_(6)-typed groups could be divided into different categories according to the atoms constituting the 6-MRs:(H_(x)C_(3)N_(3)O_(3))^(x-3)(x=0-3)(cyanurate ion),(H_(x)C_(4)N_(2)O_(3))^(x-4)(x=2,3)(barbi-turate ion),(C_(3)H_(7)N_(6))^(+)(melamine ion),(C_(5)H_(6)ON)^(+)(4-hydroxypyridine cation),and(C_(4)H_(6)N_(3))^(+)(2-amino-pyrimidinium cation).In this review,we introduced the research advances of NLO materials withπ-conjugated B_(3)O_(6)-typed groups,and summarized the crystal structures,synthetic methods,optical performances,as well as the relationships between structures and properties.This work provided a clear perspective for understanding the coplanarπ-conjugated B_(3)O_(6)-typed groups with their optical functional properties and promote the searches to develop potential NLO functional crystals.
基金supported by the National Natural Science Foundation of China(No.52072109)the Top Young Talents Project of Hebei Education Department(BJK2023029).
文摘Nonlinear optical(NLO)crystals are key materials for solid-state lasers,which play an important role in modern science and technology.However,owing to the intrinsic limitation of functional building units(FBUs)in conventional compounds,it is difficult to surpass the performance of existing materials.Therefore,it is necessary to continuously explore new NLO-active FBUs to overcome the recent stagnant situation.Recently,a lot of new FBUs were discovered as NLO-active units in different wavelength ranges.Their contributions are confirmed by the performance of corresponding crystals.In this review,newly identified NLO-active units and corresponding NLO crystals are summarized and discussed in terms of crystal structure,NLO performance,and structure-property relationship.One can find that the heteroleptic coordinated tetrahedra and organic π-conjugated planar groups are the main source of new FUBs that will be a research hotspot in further research work.This review concludes the feasible directions on the exploration of new NLO crystals to satisfy the urgent requirements.
