Article
Nanoscience & Nanotechnology
Jizhou Wang, Kai Wang, Yujie Shen, Zehua Han, Fu Li, Zhe He, Da-wei Wang, Alexei Sokolov, Marlan O. Scully
Summary: The coherent vibrational spectroscopy based on molecular infrared-active resonance utilizes two femtosecond pulses to generate an IR-resonant third-order sum-frequency signal. This technique is highly sensitive to molecular vibrations and can provide chemical information on various biological samples in their natural water-rich state. It can also be used to study the dynamics of IR-active vibrational modes, such as measuring the decoherence time.
Review
Chemistry, Analytical
Linnan Jia, Jiayang Wu, Yuning Zhang, Yang Qu, Baohua Jia, David J. Moss
Summary: This paper reviews the recent advances in research on third-order optical nonlinearities of two-dimensional (2D) materials in optical communication systems. The material properties and characterization methods of 2D materials are discussed, along with a summary of the measured n(2) values in the telecommunications band. The current challenges and future perspectives are also discussed.
Article
Materials Science, Multidisciplinary
Zhen Yang, Haonan Hu, Qiuli Li, Zheng Zhang, Lei Niu, Jian Wu, Tengxiu Wei, Yuanhuan Sun, Yiming Fang, Xunsi Wang, Zhiyong Yang, Jinfeng Zhou, Rongping Wang
Summary: By preparing GexSe10Te90-x glasses with varying Te contents and measuring their properties, it was found that the glasses exhibit different optical characteristics depending on the composition, with the nonlinear optical refractive index showing significant variations. These Te-based glasses show potential for applications as mid- and far-infrared nonlinear optical devices.
Article
Instruments & Instrumentation
Zhongshuai Zhang, Bin Guo, Yanyan Huo, Shuyun Wang, Tingyin Ning
Summary: We investigated the third-order optical nonlinearity in indium tin oxide (ITO) films with different grain orientations grown using magnetron sputtering technique. The nonlinear refractive index n2 and nonlinear absorption coefficient beta were measured by the Z-scan method and were found to be significantly influenced by grain orientations. Specifically, ITO films with near pure (222) crystalline orientation prepared at 90 W exhibited the highest values of n2 and beta compared to polycrystalline films prepared at different powers. The results indicate that the third-order optical nonlinearity in ITO films is governed by the crystalline orientation (222), providing guidance for fabricating ITO films with optimized third-order optical nonlinearity for high-performance nonlinear optical devices.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Optics
Tingyin Ning, Xiuru Yu, Luying Yin, Qingmeng Zhang
Summary: The optical nonlinearity in glass and glass-ceramic containing fermelectric nanocrystals was investigated, showing potential applications for all-optical photonic devices. The values of the third-order and fifth-order nonlinear refractive indices were determined, along with the three-photon absorption coefficient values for the samples.
Article
Materials Science, Ceramics
Kangkang Wang, Wenfeng Wang, Changgui Lin, Xiang Shen, Shixun Dai, Feifei Chen
Summary: Transparent chalcogenide glass ceramics (ChGCs) based on a binary germanium-sulfur (Ge-S, GS) chalcogenide system were synthesized and embedded with GeS2 nanocrystals. The study showed that this material has a smaller optical bandgap energy, higher mechanical strength, and significantly enhanced third-order optical nonlinearity, making it suitable for optical limiting applications.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Condensed Matter
Imran Ahmad Salmani, Mohd. Shahid Khan, Javid Ali, Aurangzeb Khurram Hafiz, Mohd Mehkoom, S. M. Afzal, Mohd Saleem Khan
Summary: This study examines the multiferroic and nonlinear optical properties of pristine and Yttrium (Y3+) substituted BiFeO3 nanoparticles synthesized by sol-gel technique, as well as the thin films of these nanoparticles. Various techniques, including XRD, Fullprof, XPS, AFM, FESEM, and TEM with SAED, were used to study the structure and morphology of the nanoparticles. The doping of Y3+ ions in the nanoparticles significantly modified and improved their optical, structural, and multiferroic properties. The linear optical properties were characterized using UV-Visible, Raman, and Photoluminescence techniques, while the third-order nonlinear absorption coefficient and third-order susceptibility were investigated using a single beam Z-scan technique. The films exhibited saturation absorption behavior, which increased with increasing Yttrium (Y3+) substitution in BiFeO3, making them promising materials for optoelectronic devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
I. P. Primsa, M. C. Sreenath, V. M. Anandakumar, I. Hubert Joe
Summary: The study investigates the fifth-order optical nonlinearity in an organic dye at low intensity level, revealing a positive fifth-order nonlinear refractive index. The compound exhibits self-defocusing behavior under specific laser excitation, making it a potential candidate for an optical limiter at low power. The nonlinearities in the compound have both thermal and electronic origins, as shown by theoretical and experimental methods.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Optics
Yueqiu Hu, Yang Gao, Yuejia Shi, Guanghao Rui, Jun He, Yiping Cui, Bing Gu
Summary: The spatial self-phase modulation (SSPM) effect is extensively utilized in characterizing 2D nanomaterials, with the narrow rings and wide rings in SSPM patterns identified as originating from optical Kerr nonlinearity (OKN) and thermally induced nonlinearity (TIN), respectively. This study offers an efficient approach to distinguish OKN from TIN in 2D nanomaterial dispersions and extract nonlinear optical parameters.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Md Soif Ahmed, Chinmoy Biswas, Dipanjan Banerjee, Prabhakar Chetti, Jye-Shane Yang, Venugopal Rao Soma, Sai Santosh Kumar Raavi
Summary: In this study, we investigated the third-order non-linear optical properties of four structurally unconstrained green fluorescence protein chromophores using experimental techniques and theoretical calculations. The results showed strong reverse saturable absorption and positive non-linear refractive index nature in these molecules under femtosecond pulse excitation. The third-order non-linear optical coefficients of these molecules were found to be larger than those reported in recent literature.
FRONTIERS IN PHYSICS
(2022)
Article
Polymer Science
Shahla Raki Tahmasebi, Azadeh Haghighatzadeh
Summary: In this study, Ag-loaded ZnO/SnO2 composite nanoheterojunctions were synthesized using a two-step co-precipitation method and characterized using various techniques. The composite nanoparticles showed enhanced absorption ability and delayed recombination rate of photoexcited electron-hole pairs. Nonlinear optical behaviors, such as self-defocusing phenomenon and reverse saturable absorption response, were observed in response to intense laser fields. The third-order nonlinear susceptibility for Ag-loaded ZnO/SnO2 composite nanoheterojunctions was found to be significantly higher than that of sole ZnO/SnO2 nanoparticles.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Materials Science, Ceramics
Yinwei Yang, Oumar Ba, Shixun Dai, Feifei Chen, Georges Boudebs
Summary: The study demonstrates that GIS ChGs exhibit significant third-order optical nonlinearity properties under specific compositions, making them suitable for use in optical devices at long wavelengths.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Review
Chemistry, Inorganic & Nuclear
S. Shakeel Nawaz, S. Ranganatha, S. Supriya, Dileep Ramakrishna
Summary: In recent years, there has been a growing interest in the molecular engineering of coordination metal complexes for their applications in nonlinear optics (NLO) in areas such as optoelectronics and optical data storage technology. The control over the optical nonlinearity is induced by the combination of transition metals and organic moieties, which not only enhance the intensity but also significantly affect the polarization of incident laser light. Coordination metal complexes are ideal targets for research due to their robustness, physical and chemical stability, and tunability of NLO responses. This review focuses specifically on small mononuclear metal complexes for NLO applications.
REVIEWS IN INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Guangrui Mao, Ziliang Li, Chengtao Jia, Changgui Lin, Shixun Dai, Tiefeng Xu, Feifei Chen
Summary: This work presents a systematic study on the third-order optical nonlinear (TONL) properties of chalcogenide glasses (ChGs) in the germanium-gallium-sulfur (Ge-Ga-S, GGS) ternary system. The study reveals that the TONL properties of GGS ChGs can be highly tuned by the glass composition, surpassing those of other ChG systems. It is found that the TONL properties of GGS ChGs strongly depend on the deviation level of glass composition from chemical stoichiometry, which is related to the presence of different types of defective units in the GGS glass network. Additionally, the TONL dispersion of GGS ChGs deviates from the classical theories based on crystalline semiconductors due to the occurrence of multiple-step absorption processes between gap states near the band gap. This renders GGS ChGs applicable for various nonlinear optical functionalities.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Ziliang Li, Kangkang Wang, Jiao Zhang, Feifei Chen, Changgui Lin, Shixun Dai, Wei Ji
Summary: In this study, the third-order optical nonlinearity in Ge-Sb-S chalcogenide glasses with different atomic ratios was characterized. The nonlinear optical parameters were interpreted from a structural perspective using the constrained mode and Raman spectra. The contribution of structure units within the Ge-Sb-S glass network to the third-order optical nonlinearity was evaluated. The results showed that as the mean coordination number approached 2.65, the Ge-Sb-S glass network transitioned to a rigid 3D phase, leading to a rapid increase in the third-order nonlinear susceptibility. Furthermore, the third-order nonlinear susceptibility, dependent on the mean coordination number, exhibited a wide variation, indicating a high modification flexibility for the nonlinear optical properties of Ge-Sb-S chalcogenide glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Dileep Kottilil, Mayank Gupta, Shunbin Lu, Anu Babusenan, Wei Ji
Summary: In this study, a large polariton interaction strength is demonstrated in a 2D nanolayered metal-organic framework (MOF) at room temperature, which allows for polariton lasing at low pump fluence. The experiment observes polariton lasing under extremely low pump fluence and a spontaneous transition to a breakdown region, followed by ordinary photon lasing as the pump fluence increases. This work introduces MOF as a cost-effective and scalable solution for microscale coherent quantum light sources and polaritonic devices.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Jiangmin Jiang, Zhenghui Pan, Jiaren Yuan, Jun Shan, Chenglong Chen, Shaopeng Li, Yaxin Chen, Quanchao Zhuang, Zhicheng Ju, Hui Dou, Xiaogang Zhang, John Wang, John Wang
Summary: By constructing a stable and robust g-C3N4 protective layer on the surface of zinc metal anodes, the performance of aqueous zinc-ion batteries can be improved, inhibiting dendrite growth and enhancing Coulombic efficiency and lifespan.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Soren S. Sorensen, Xiangting Ren, Tao Du, Ayoub Traverson, Shibo Xi, Lars R. Jensen, Mathieu Bauchy, Satoshi Horike, John Wang, Morten M. Smedskjaer
Summary: This work demonstrates that water can depolymerize polyhedra with labile metal-ligand bonds in a cobalt-based coordination network, resulting in nonstoichiometric glasses. The addition of water molecules promotes the breakage of network bonds and coordination number changes, thereby lowering melting and glass transition temperatures. These structural changes alter the physical and chemical properties of the glass, similar to the concept of modifiers in oxides. This approach can be extended to other transition metal-based coordination networks, enabling diversification of hybrid glass chemistry.
Article
Materials Science, Multidisciplinary
Lei Jiang, Mengrui Lu, Piaoyun Yang, Yijing Fan, Hao Huang, Juan Xiong, Zhao Wang, Haoshuang Gu, John Wang
Summary: In this study, a pressure sensor matrix capable of two-dimensional pressure mapping was developed by using patterned piezoelectric (K,Na)NbO3 (KNN) nanorod arrays. The KNN nanorods exhibited excellent mechanical flexibility, elasticity, and piezoelectric performance, enabling a high sensitivity of up to 0.20 V N-1 and a detection limit as low as 20 g. The spatially separated micro sensor matrix allowed for accurate self-powered pressure mapping and precise analysis of mechanical stimulations.
SCIENCE CHINA-MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Bibhuti Bhusan Rath, Dileep Kottilil, Wei Ji, Jagadese J. J. Vittal
Summary: The emergence of metal organic frameworks (MOFs) as advanced photonic materials has placed them at the forefront of exploration. Nonlinear optical (NLO) phenomena such as simultaneous two-photon absorption and consequent upconversion emission have been in demand for promising applications. A rational design approach based on the fundamental structure-property relationship is key for the fabrication of nonlinear optically active MOF materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Weimin Chen, Wenbin Xiang, Chunzheng Bai, Baohua Zhu, Bing Gu, Changgui Lv, Jiayu Zhang
Summary: Amorphous GeSe films were prepared by vacuum thermal evaporation and exhibited polycrystalline phase after annealing. The films showed reverse saturable absorption and self-focusing phenomenon. The annealed recrystallized GeSe films had significantly improved nonlinear optical parameters and potential applications in optical limiting devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Xiaoxue Li, Guanghao Rui, Jun He, Bing Gu
Summary: In this study, a non-Hermitian induced Su-Schrieffer-Heeger (SSH) lattice is designed, and the existence of diverse higher-order topological bound states in the continuum (BICs) is demonstrated. These hybrid states with an amplified and localized field have been shown to efficiently excite non-linear harmonic generation. The appearance of these topological bound states will advance the study of the interplay of topology, BICs, and non-Hermitian optics.
Article
Chemistry, Physical
Hongfei Cheng, Jun Zhou, Huiqing Xie, Songlin Zhang, Jintao Zhang, Shengnan Sun, Ping Luo, Ming Lin, Shijie Wang, Zhenghui Pan, John Wang, Xian Jun Loh, Zhaolin Liu
Summary: Direct formic acid fuel cells (DFAFCs) are a promising energy source in the future low-carbon economy, but the lack of efficient electrocatalysts for anodic formic acid oxidation (FAO) hinders their scale-up and commercialization. The FAO performance of palladium hydrides (PdHx) has been found to be superior to pristine Pd, and this study explores the controlled synthesis and electrocatalytic behaviors of PdHx-based nanomaterials. The hydrogen intercalation-induced crystallization of PdNiP alloy nanoparticles is reported, and the obtained PdNiP-H nanoparticles exhibit excellent FAO performance, demonstrating their potential for DFAFC applications.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Lu Mao, Xiaoyu Hao, Yu Zhang, Siew Yee Wong, Jiating He, Suxi Wang, Ximeng Liu, Xiaolei Huang, John Wang, Xu Li
Summary: In this study, hierarchical NiFe hydroxide-Cu arrays are prepared as the electrocatalysts for oxygen evolution reaction (OER) through solution etch and sequential electrolysis. The electrochemically reduced Cu nanoarrays serve as a conductive core, providing superior conductivity for electron transfer, while the unique hierarchical 3D structure offers a large active surface area, a short ion diffusion path, and open channels for efficient gas release. The resulting NiFe hydroxide-Cu arrays on copper foam exhibit outstanding catalytic performance with current densities of 10 and 100 mA cm(-2) achieved at 245 and 300 mV, respectively, in a 1 M KOH solution. Additionally, a small Tafel slope of 51 mV dec(-1) and excellent electrochemical durability of up to 100 h are demonstrated.
ACS APPLIED NANO MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Xianyang Zhang, Pengfei Chen, Siwuxie He, Bowen Jiang, Yong Wang, Yonghua Cheng, Jian Peng, Francis Verpoort, John Wang, Zongkui Kou
Summary: Biosensors featuring single molecule detection offer great opportunities in various fields, but face challenges due to the lack of activity, precision molecule selectivity, and understanding of the operating mechanism. Single-atom catalysts (SACs), particularly those that mimic the natural metalloenzyme structure, provide practical-use feasibilities for single molecule detections with high molecular selectivity and easy fabrication. This review discusses the history, advantages, and applications of SACs in molecule-scale biosensors, emphasizing their sensing modes and coordination-modulated signal amplifications.
Review
Chemistry, Multidisciplinary
Yue Guo, Hanmei Jiang, Binbin Liu, Xingyang Wang, Yifu Zhang, Jianguo Sun, John Wang
Summary: Aqueous zinc-ion batteries (ZIBs) are considered promising for large-scale grid energy storage due to their safety, low costs, and environmental friendliness. Vanadium oxides, particularly V2O5, have been widely used as cathode materials for ZIBs because of their high theoretical capacity and structural stability. However, there are challenges in achieving high capacity, long lifespan, and excellent rate performance with vanadium-based ZIBs.
Article
Chemistry, Multidisciplinary
Yang Gao, Yueqiu Hu, Cheng Ling, Guanghao Rui, Jun He, Bing Gu
Summary: As an allotrope of phosphorus, layered violet phosphorus (VP) is widely used in electronics, photonics, and optoelectronics, but its nonlinear optical properties need further exploration. In this study, VP nanosheets were prepared and characterized, and their spatial self-phase modulation (SSPM) effects were investigated for all-optical switching applications. The SSPM ring forming time and the third-order nonlinear susceptibility of monolayer VP nanosheets were found to be about 0.4 s and 10(-9) esu, respectively. The results demonstrate the potential of two-dimensional nanomaterials for designing and realizing non-degenerate nonlinear photonic devices.
Article
Chemistry, Multidisciplinary
Weihao Liu, Jing Yang, Yizhe Zhao, Ximeng Liu, Jian Heng, Minghui Hong, Yong-Wei Zhang, John Wang
Summary: This study introduces a novel laser-ironing approach to modulate the structural and compositional evolution of electrocatalysts during the reaction, enhancing their performance and stability. The laser-ironing capping layer (LICL) formed during the process sustains the leaf-like morphology and promotes the formation of highly active Co3O4 nanoclusters. The results provide new insights into facile and high-precision surface microstructure control.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Liuhao Zhu, Xiaohe Zhang, Guanghao Rui, Jun He, Bing Gu, Qiwen Zhan
Summary: This study presents a novel optical skipping rope technology that transfers transverse orbital angular momentum to trapped particles, enabling their rotation and specific orbital motion parallel to the optical axis. This innovative technology significantly increases the manipulation freedom of optical tweezers, holding great significance for optical manipulation, micromechanics, and celestial orbit mimicry applications.
Article
Chemistry, Multidisciplinary
Wenbin Xiang, Baohua Zhu, Chunzheng Bai, Bing Gu, Changgui Lv, Jiayu Zhang
Summary: In this study, CdSe-CdS core-shell nanoplatelets were synthesized and the third-order nonlinear optical properties related to shell thickness were measured. The study found that the imaginary part of the third-order nonlinear susceptibility increased monotonically with the growth of shell thickness, while the real part showed a non-monotonic change. The trends were further explained by analyzing the optical properties and understanding the variations in defect distribution, exciton binding energy, and quantum confinement effects. The results highlighted the importance of proper shell passivation in enhancing the luminescent performance and third-order nonlinearity of the nanoplatelets.
