INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yuanyu Yang,Yao Guo,Bingbing Zhang,Ting Wang,Yi-Gang Chen,Xiaohui Hao,Xiaoxiu Yu,Xian-Ming Zhang
The exploration of nonlinear-/linear-optical crystal materials with high performance is an extremely difficult research project. Herein, the two new lead tellurite crystals BaPbTe2O6 and PbVTeO5F were successfully obtained through a facile hydrothermal synthesis strategy. BaPbTe2O6 lies in the noncentrosymmetric (NCS) and chiral orthorhombic space group P212121, featuring a unique ∞1[PbTe2O6] chain consisting of the PbO4 and TeO3 building units, while PbVTeO5F belonging to the centrosymmetric (CS) orthorhombic space group Pbca manifests a 2D layer made up of ∞1[PbO4F2] chains and novel [V2Te2O10F2] clusters. Further, a systematic analysis of lead tellurites finds that the coordination geometries of the Pb atom exert a considerable influence on the connection modes of Pb–O and Te–O building units. BaPbTe2O6 shows a great second-harmonic-generation (SHG) effect of ∼5× the benchmark KH2PO4 (KDP) and a large optical birefringence of 0.086 at 590 ± 3 nm. PbVTeO5F demonstrates a remarkably larger birefringence of 0.142 at 590 ± 3 nm, benefiting from the introduction of the VO5F octahedral unit. Theoretical studies reveal that the large SHG and birefringence in BaPbTe2O6 can be attributed to TeO3 and PbO4 polyhedra with active lone pairs, while the remarkably enlarged birefringence in PbVTeO5F is attributable to the highly distorted octahedral VO5F. The functional orientations of active building units may offer a practical insight into the design of the desired optical functional materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2023
·
IF 9
Bohui Xu,Pifu Gong,Fan Liu,Xingyu Zhang,Hao Huo,Zheshuai Lin
The search for new ultraviolet (UV) or deep-UV nonlinear optical (NLO) crystals would greatly prompt the development of laser science and technology. As the NLO performance of these crystals is mainly determined by the anionic groups, herein the (SO 3 CF 3 ) − group is highlighted as a promising non-π-conjugated NLO-active motif with excellent deep-ultraviolet (DUV) transmission and good NLO properties. First-principles studies reveal that this group possesses the largest HUMO-LOMO gap among the (SO 4 ) 2− -based units, as well as a relatively large NLO response. The further experiments demonstrate that the CsSO 3 CF 3 compound containing the (SO 3 CF 3 ) − motif exhibits th UV cutoff edge below 200 nm and an NLO effect ≈0.8× KH 2 PO 4 , confirming the potentials of this new motif for UV and DUV NLO applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2016
·
IF 4.055
Li Ma,Weidong Xiang,Haihong Gao,Jiangyan Wang,Yingying Ni,Xiaojuan Liang
We report the synthesis and luminescent properties of carbon dots whose peak fluorescence emission are independent of excitation wavelength. Meanwhile, varying the concentrations of carbon dots can achieve a shift in the emission wavelength . Detailed structural characterization and optical properties of carbon dots with different concentrations were studied. Particularly, the blue-shifted excitation-independent emission peaks were observed when the concentration of carbon dots decreased. The decreased fluorescent properties were considered to originate from the surface modification of carbon dots. Additionally, we investigated the third-order nonlinear optical responses of carbon dots with different concentrations by Z-scan technique with single 190 fs laser pulses at 532 nm. It was found that both samples exhibited positive nonlinear refractivity and negative nonlinear absorption coefficient in the fs regime. These tunable optical properties would provide more possibilities for the utility of carbon dots in optical devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2021
·Vol. 27
·期 1
·85
·
IF 4.412
Long Chen,Cuiyu Wu,Zheng Xie,Chenghua Sun,Shuyun Zhou
With the advancement of ultra-fast and high-energy pulsed laser output, lasers have caused serious harm to precision instruments and human eyes. Therefore, the development of optical limiting materials with a fast response, low optical limiting threshold, and high damage threshold are important. In this work, for the first time, it is reported that phosphors Gd2O2S:Tb3+(GOS) displays exceptional functionality in laser protection. GOS with sizes of 11 μm, 1 μm, and 0.45 μm are prepared. Based on the optical limiting and Z-scan technology systems under 532 nm and 1064 nm nanosecond laser excitation, the nonlinear optical properties of GOS are investigated. It is found that GOS exhibits outstanding optical limiting properties. In addition, the optical limiting response of GOS is size-dependent. Concerning the largest particle size, GOS has the best nonlinear optical response, while the precursor shows no nonlinear optical performance. Meanwhile, GOS doped gel glass also displays excellent optical limiting properties with high transmittance, which preliminarily validates the application of GOS and other scintillators in nonlinear optics and encourages more research to better realize the potential of GOS.Keywords:scintillator;nonlinear optics;optical limiting;size-dependent
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 29
·12090-12097
·
IF 3.5
Yingying Kong,Hongshan Wang,Wang Zhao,Qi Sun,Junjie Li,Shilie Pan
Hg-based compounds show abundant structural diversity and distinguished properties. Herein, a new phase transition compound CsHg2I5 was reported. The high-temperature phase β-CsHg2I5 with rare [Hg2I5] dimers was synthesized by the flux method at 573 K, and it shows a reversible phase transition at a low temperature of ∼100 K to form the low-temperature phase α-CsHg2I5. The two phases crystallize in the same P21/c space group, with different crystal structures. β-CsHg2I5 is composed of rare [Hg2I5] dimers and [CsI11] polyhedral units, while α-CsHg2I5 is composed of [Hg4I11] and [CsI10] units. The experimental band gap of β-CsHg2I5 was found to be 2.58 eV. Owing to the presence of [Hg2I5]∞ pseudo-layers, β-CsHg2I5 exhibits large optical anisotropy with a calculated birefringence of 0.132@1064 nm. Meanwhile, β-CsHg2I5 is a congruent compound and the congruent point is ∼481 K. Theoretical calculations indicate that the rare [Hg2I5] dimer is a nonlinear active unit, which can be used as a new fundamental building block for the design of advanced nonlinear optical materials. Moreover, a CsI–HgI2 pseudo-binary diagram was drawn. The results enrich the structural diversity of Hg-based halides and give some insights into the development of new functional materials based on rare [Hg2I5] dimers.
研究领域:
材料科学
·
晶体学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2017
·Vol. 10
·期 11
·1332
·
IF 2.654
Xinghua Wu,Chao Tan,Qingkai Wang,Yanyan Guo,Dianyuan Wang,Yongqian Wang,Dawei Meng
Two-dimensional Bi2Se3nanosheets with hexagonal shape are synthesized by a solution synthetic route. The Bi2Se3nanosheets are 120 nm in edge width and 7 nm in thickness. The size of the Bi2Se3nanosheets can be controlled by choosing different kinds of reducing agents including hydroxylamine and ethylenediamine. Subsequently, we demonstrate a configuration of two-color all-optical switching based on plasma channels effect using the as-synthesized Bi2Se3nanosheets as an optical media. The signal light can be modulated as two states including dot and ring shape by changing the intensity of control light. The modulated signal light exhibits excellent spatial propagation properties. As a type of interesting optical material, ultrathin two-dimensional Bi2Se3nanosheets might provide an effective option for photoelectric applications.Keywords:nanoparticles;optical materials and properties;nanocrystalline;optical switching
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 42
·17771-17777
·
IF 7.394
Hui Long,Lili Tao,Chun Yin Tang,Bo Zhou,Yuda Zhao,Longhui Zeng,Siu Fung Yu,Shu Ping Lau,Yang Chai,Yuen Hong Tsang
To control the optical properties of two-dimensional (2D) materials is a long-standing goal, being of both fundamental and technological significance. Tuning nonlinear optical absorption (NOA) properties of 2D transition metal dichalcogenides in a cost effective way has emerged as an important research topic because of its possibility to custom design NOA properties, implying enormous applications including optical computers, communications, bioimaging, and so on. In this study, WS2 with different size and thickness distributions was fabricated. The results demonstrate that both NOA onset threshold, FON, and optical limiting threshold, FOL, of WS2 under the excitation of a nanosecond pulsed laser can be tuned over a wide range by controlling its size and thickness. The FON and FOL show a rapid decline with the decrease of size and thickness. Due to the edge and quantum confinement effect, WS2 quantum dots (2.35 nm) exhibit the lowest FON (0.01 J cm−2) and FOL (0.062 J cm−2) among all the samples, which are comparable to the lowest threshold achieved in graphene based materials, showing great potential as NOA materials with tunable properties.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 17
·5798-5803
·
IF 4
Lehui Liu,Feifei Yuan,Yisheng Huang,Zhoubin Lin,Lizhen Zhang
The [B3O6] group has attracted a lot of attention as α-BaB2O4 (α-BBO) is composed of the [B3O6] group showing a short UV cut-off edge and a large birefringence. However, it is difficult to synthesize novel crystals with properties beyond α-BBO using [B3O6] as a fundamental building block (FBB). Hence, we successfully synthesized two cases of α-BBO-type organic–inorganic hybrid compounds using α-BBO as the template and melamine [C3N6H6] as the fundamental building block. The coplanar and parallel arrangement of π-conjugated [C3N6H6] groups makes them exhibit excellent optical properties, including improved birefringence responses (0.264 and 0.243@546 nm) and wide bandgaps (4.12 and 4.20 eV).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Juhe Liu,Ming-Hsien Lee,Chunxiao Li,Xianghe Meng,Jiyong Yao
In this paper, a revised structure determination of an already known compound CsNbOB2O5 with new structural insights was performed and the detailed characterization of its optical properties was reported for the first time. CsNbOB2O5 was synthesized by spontaneous crystallization. It crystallizes in the Pmn21 space group, and the unit lattice parameters are a = 7.5220(7) Å, b = 3.9881(4) Å, c = 9.7167(9) Å, and Z = 2. In the structure of CsNbOB2O5, a [NbO5] square pyramid and [B2O5] unit are linked to constitute an infinitely extended two-dimensional ∞2[NbOB2O5] layer via sharing oxygen atoms. Between these two-dimensional layers, there are no covalent bonds perpendicular to their planes based on Mulliken bond order analysis. CsNbOB2O5 has a wide band gap (4.52 eV) and a large second-harmonic-generation (SHG) response (1.2 × KDP) and demonstrates type-I phase-matchable behavior. First-principles simulations reveal that the birefringence is approximately 0.10. Moreover, SHG-weighted charge density analysis shows that the primary source of the nonlinearity of the title compound is the distorted NbO5 square pyramids.
研究领域:
材料科学
·
晶体学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Yue Wang,Yongfang Shi,Yuan Lin,Zhe Chen,Liting Li
A new quaternary chalcogenide Y 3 GaGe 0.5 S 7 belongs to R 3 MTQ 7 family was discovered for the first time, which was obtained through a conventional solid-state reaction at high temperature. The crystal structure indicates that Y 3 GaGe 0.5 S 7 crystallizes in hexagonal system P 6 3 space group ( a = 9.6204(6) Å, c = 6.0111(7) Å, V = 481.80(8) Å 3 and Z = 1). The crystal structure of the title compound is assembled by chains of face-sharing GaS 6 octahedra that are surrounded by both discrete Y cations and isolated Ga/GeS 4 tetrahedra. UV–vis–NIR spectroscopy measurement reveals that the optical band of the title compound is 2.30 eV. It shows weak Second Harmonic Generation (SHG) property but with the high laser-induce damage threshold (LIDT) value (8.55 MW/cm 2 ), which is close to 3 times that of AgGaS 2 (2.82 MW/cm 2 ). Furthermore, the first-principle calculations are applied to depth analysis the relationship between linear and nonlinear of optical properties and crystal structure.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 10
·3284-3292
·
IF 4.174
Xinyuan Zhou,Junben Huang,Gemei Cai,Hengwei Zhou,Yineng Huang,Xin Su
The structure–property relationship of photoelectric functional materials has been recognized as a hot topic. The study of the inner link between the band gaps and birefringence of optical materials is extremely crucial for the design and creation of novel optical devices, but still remains rather unexplored. In this work, taking a series of borates with only planar-triangular BO3 groups, α-/β-TM3(BO3)2 (TM = Zn, Cd), Cd2B2O5, and M3(BO3)2 (M = Hg, Mg, Ca, Sr) as the research subject, the comprehensive relationship between their electronic structures and linear optical properties has been systematically investigated. Through combining experimental measurements and theoretical calculations, the effect of optical polarizability on the birefringence of these borates was clarified. Based on the present discussion, the relationship between the O (2p) bandwidth of the highest valence band and the HSE06 band gaps is opposite. Meanwhile, a method involving the determination of so-called optical permittivity Δε to evaluate the magnitude of birefringence Δn is found to be feasible. A large Δε makes a positive contribution to Δn. In addition, the experimentally measured band gaps and IR vibrations are in good agreement with theoretical results for the compounds α-Cd3(BO3)2 and Cd2B2O5.
研究领域:
材料科学
·
光学
·
光电功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2018
·
IF 3.972
Conggang Li,Xiangxin Tian,Zeliang Gao,Qian Wu,Peng Zhao,Youxuan Sun,Chengqian Zhang,Shaojun Zhang,Deliang Cui,Xutang Tao
Acentric compounds with a layered structure are of current interest owing to their advanced functional properties for technical applications. However, the growth of bulk single crystals of acentric materials with a quasi-two-dimensional structure is challenging, which severely hinders the intrinsic properties investigation and optoelectronic applications of these materials. Herein, we report the controlled growth of bulk CdTeMoO6 single crystals with a layered structure and the investigation of their linear and nonlinear optical properties. High quality CdTeMoO6 single crystals with dimensions of ∼26 × 10 × 9 mm3 were successfully grown through the modified top-seeded solution growth method using TeO2-MoO3 as a flux. The transparent range of CdTeMoO6 single crystals is in the range of 0.345–5.40 μm, and with large birefringence (Δn = no – ne = 0.2868–0.2219 from 514 nm to 1.5467 μm). In addition, the nonlinear optical (NLO) coefficient d36 of CdTeMoO6 single crystals was measured to be 8.5 pm/V using Maker Fringe techniques. We also found CdTeMoO6 is type-I phase-matchable based on the calculated phase-matching curves. Our results indicated that CdTeMoO6 single crystal is an excellent birefringent material combined with a promising NLO material for optoelectronic applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）