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)
Article
Optics
Liqi Cui, Ruifeng Niu, Weitian Wang
Summary: Rutile TiO2 and Ti0.9In0.1O2 thin films were fabricated using a pulsed laser deposition method. The films exhibited good transparency in the visible spectral range, and the Ti0.9In0.1O2 film showed a blue-shifted absorption edge compared to undoped TiO2 film. The nonlinear optical properties of the films were investigated, and it was found that both Ti0.9In0.1O2 and TiO2 films exhibited nonlinear saturable absorption and negative nonlinear refraction. The doping of In ions did not significantly affect the nonlinear optical absorption of the TiO2 film, but resulted in a two-fold increase in the nonlinear refractive index of the Ti0.9In0.1O2 film.
OPTICAL ENGINEERING
(2022)
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
Chemistry, Physical
Yong Liu, Chi Pang, Hiroshi Amekura, Thomas Schumann, Peng Liu, Zhixian Wei, Haocheng Liu, Rang Li
Summary: By designing the structure of metal nanoparticles, the manipulation of surface plasmonics can be achieved, resulting in enhanced absorption and fine-tuning of localized surface plasmon resonance band. This offers potential for improving the performance of nonlinear photonic devices.
APPLIED SURFACE SCIENCE
(2023)
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
Chemistry, Applied
Ali Husain, Asaithampi Ganesan, Mathew Sebastian, Saad Makhseed
Summary: The study reports the design and synthesis of a new type of nonlinear photonic material, Zinc(II) phthalocyanine macmcycle (Pc-pyrene), with binary oriented pyrene units. The investigation of the ultrafast nonlinear optical characteristics of these macmcycles shows their potential for optical limiting and switching applications, with Pc-pyrene-embedded PMMA films demonstrating significant enhancement in three-photon absorption coefficient and excellent optical limiting threshold.
Article
Nanoscience & Nanotechnology
Tongtong Kang, Zongwei Ma, Jun Qin, Zheng Peng, Weihao Yang, Taixing Huang, Shilin Xian, Shuang Xia, Wei Yan, Yucong Yang, Zhigao Sheng, Jian Shen, Chaoyang Li, Longjiang Deng, Lei Bi
Summary: This paper reports on active metasurfaces based on Au/VO2 that demonstrate high transparency, high power efficiency, ultrafast switching, and large-scale fabrication capability. Fabricated using polystyrene sphere colloidal crystal self-assembly, these centimeter-scale Au/VO2 metasurfaces exhibit excellent optical modulation performance in static heating experiments and ultrafast pump-probe experiments. The alignment of surface plasmon resonance wavelength with the pump wavelength enables swift switching effects, showcasing a practical approach to fabricating large-scale and power-efficient active metasurfaces for ultrafast optical modulation.
Article
Nanoscience & Nanotechnology
Tongtong Kang, Zongwei Ma, Jun Qin, Zheng Peng, Weihao Yang, Taixing Huang, Shilin Xian, Shuang Xia, Wei Yan, Yucong Yang, Zhigao Sheng, Jian Shen, Chaoyang Li, Longjiang Deng, Lei Bi
Summary: This study reports on active metasurfaces based on Au/VO2, which exhibit high performance in optical modulation. These metasurfaces, fabricated by self-assembly, demonstrate high transparency, high power efficiency, ultrafast switching speed, and large-scale manufacturing capability, making them suitable for ultrafast optical modulation applications.
Article
Optics
Jian Xin, Yue Liang, Junhua Gao, Yuxiao Wang, Yinglin Song, Xueru Zhang
Summary: In this study, the time-dependent change in the effective permittivity of an Ag nanorod array in hyperbolic metamaterials (HMMs) is extracted, and the existence of an ultrafast recovery process is experimentally confirmed. The calculation based on the extracted nonlinear effective permittivity indicates that the ultrafast signal originates from the superposition of two slower recovery processes. These results reveal that the superposition of two nonlinear processes with different signs and recovery speeds can lead to faster signal recovery in the combined process.
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
Chemistry, Physical
Adrian Petris, Petronela Gheorghe, Tudor Braniste, Ion Tiginyanu
Summary: The ultrafast third-order optical nonlinearity of c-plane GaN crystal under excitation of ultrashort (f s) high repetition rate laser pulses at 1550 nm wavelength was investigated, and the third-order nonlinear optical susceptibility responsible for third-harmonic generation was determined. This parameter is important for the potential use of this material in ultrafast photonic functionalities.
Article
Optics
David Zuber, Sven Kleinert, Ayhan Tajalli, Morten Steinecke, Marco Jupe, Ihar Babushkin, Detlev Ristau, Uwe Morgner
Summary: We investigated third harmonic generation (THG) from dielectric layers. By creating a thin gradient of HfO2 with increasing thickness, we were able to study this process in detail. This technique allowed us to understand the influence of the substrate and quantify the third (x(3)(30): 0), 0), 0)) and even fifth order (x(5)(30): 0), 0), 0), 0), - 0)) nonlinear susceptibility of layered materials at the fundamental wavelength of 1030 nm. This is the first measurement of fifth order nonlinear susceptibility in thin dielectric layers, to the best of our knowledge.
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
Materials Science, Multidisciplinary
Lino Misoguti, Guilherme Rodrigues da Silva Mattos, Luciana R. P. Kassab, Jose Joatan Rodrigues Jr, Marcio A. R. C. Alencar
Summary: Germanate glasses doped with AgNO3 and co-doped with AgNO3 and Au2O3 were synthesized, and the influence of Au2O3 addition on the nucleation and spectroscopic properties of the silver nanoparticles was investigated. Nonlinear ellipsometry technique was used to characterize the electronic contribution to the samples' nonlinear refraction and absorption, and the third-order nonlinear susceptibility was obtained for both the glass, composite samples, and individual nanoparticles. Additionally, the all-optical switching figures of merit were calculated for the samples.