Article
Optics
Simone Lauria, Mohammed F. Saleh
Summary: This paper investigates the relationship between second- and third-order nonlinearities in lithium-niobate waveguides, using uniform and linearly chirped poling patterns. The results show that the poling period can be used to transform the output spectra in a unique way.
Article
Multidisciplinary Sciences
Timothy P. McKenna, Hubert S. Stokowski, Vahid Ansari, Jatadhari Mishra, Marc Jankowski, Christopher J. Sarabalis, Jason F. Herrmann, Carsten Langrock, Martin M. Fejer, Amir H. Safavi-Naeini
Summary: In this study, the authors demonstrate a chip-scale device that can perform a comprehensive set of resonant second-order nonlinear processes, including optical parametric oscillation, with low threshold power and efficient frequency tuning ability. This research is of great importance for expanding the applications of photonics and enhancing the performance of quantum photonics platforms.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Marco S. Kirsch, Yiqi Zhang, Mark Kremer, Lukas J. Maczewsky, Sergey K. Ivanov, Yaroslav V. Kartashov, Lluis Torner, Dieter Bauer, Alexander Szameit, Matthias Heinrich
Summary: Higher-order topological insulators represent a novel topological phase with boundary modes characterized by a unique co-dimension of at least two. Despite promising preliminary considerations, experimental research on these systems has been limited to linear evolution of topological states, with observation of the interplay between nonlinearity and dynamics of higher-order topological phases remaining elusive. However, experimental demonstration of nonlinear higher-order topological corner states and observation of soliton formation in such structures could pave the way for exploring topological properties of matter in the nonlinear regime and potentially lead to the development of compact devices harnessing the intriguing features of topology.
Article
Astronomy & Astrophysics
Harvey S. Reall
Summary: This paper explores diffeomorphism invariant theories of gravity coupled to matter, focusing on second order equations of motion. It delves into specific theories such as Einstein-Maxwell and Einstein-scalar field theory, demonstrating how causality is governed by characteristic polynomials and identifying surfaces analogous to Fresnel surfaces in crystal optics. It also discusses the implications of Killing horizons and the zeroth law of black hole mechanics in these theories.
Review
Chemistry, Inorganic & Nuclear
Yaoguo Shen, Wenyue Tang, Xiaoxin Lin
Summary: This review provides a comprehensive overview of NLO sulfates, including classification, synthesis methods, crystal structure features, optical performances, and structure-property relationships. The key structure-property relationships are summarized to assist new researchers in designing superior sulfate NLO materials.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Optics
Yanlu Li, Roel Baets
Summary: This paper discusses the mechanisms of distortion in the output signals of a homodyne laser Doppler vibrometer (LDV) and proposes a simple compensation method to mitigate the nonlinear LDV distortions caused by a strong second-order ghost reflection from lens flares. The performance and limitations of this method are also explained in simulation and in experiment.
Article
Chemistry, Multidisciplinary
Xiaocong Deng, Kai Wang, Qianqian Li, Zhen Li
Summary: This study proposes a new approach to design second-order nonlinear optical polymer networks through in situ thermal crosslinking. The networks exhibit excellent optical performance and stability after in situ poling and thermal crosslinking.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Multidisciplinary
Yangkun Du, Peter Stewart, Nicholas A. Hill, Huabing Yin, Raimondo Penta, Jakub Kory, Xiaoyu Luo, Raymond Ogden
Summary: This paper investigates the application of the classical problem of indentation on an elastic substrate in the field of Atomic Force Microscopy. It highlights that linearly elastic models are insufficient for predicting force-displacement relationships at large indentation depths and suggests a nonlinear indentation model for hyperelastic materials. The authors propose a solution for second-order amplitude deformations and material nonlinearity using second-order elasticity theory, and derive analytical solutions using parabolic or quartic surfaces to mimic a spherical indenter. The results show good agreement with finite element simulations.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Optics
E. A. Cryer-Jenkins, G. Enzian, L. Freisem, N. Moroney, J. J. Price, A. O. Svela, K. D. Major, M. R. Vanner
Summary: This study characterizes the second-order coherence of Stokes scattering across the Brillouin lasing threshold using quantum optical techniques. The results show that approaching the lasing threshold power leads to the observation of super-thermal statistics, which cannot be captured by a linearized model. These findings demonstrate the potential of second-order coherence and photon-counting measurements for the advancement of understanding and characterizing Brillouin scattering.
Article
Physics, Multidisciplinary
Karim Achouri, Andrei Kiselev, Olivier J. F. Martin
Summary: We present a frequency-domain modeling technique for second-order nonlinear metasurfaces, derived from the generalized sheet transition conditions (GSTCs). By extending the GSTCs to include effective nonlinear polarizations, the effective nonlinear susceptibilities of a given metasurface can be retrieved and its nonlinear scattering responses can be predicted under arbitrary illumination conditions. The proposed model can serve as a design platform for implementing complex nonlinear metasurface based applications.
NEW JOURNAL OF PHYSICS
(2022)
Article
Astronomy & Astrophysics
Inyong Cho, Jinn-Ouk Gong, Seung Hun Oh
Summary: By investigating the scalar field and cosmological perturbations, we find that the second-order effective energy-momentum tensor (2EMT) is gauge dependent. In the slow-roll stage of inflation, 2EMT exhibits an effective fluid of w 1/4 -1=3 in various gauge conditions.
Article
Physics, Applied
Lei Meng, Zunren Lv, Hongyu Chai, Xiaoguang Yang, Tao Yang
Summary: This study discovers that Mg incorporation plays an important role in enhancing the second-order nonlinear susceptibility and laser-induced surface-damage threshold of ZnO thin films.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Adriain Dewambrechies, Alexander Yu. Polyakov, Betul Kucukoz, Timur O. Shegai
Summary: In this study, the formation of strained ultrasharp zigzag edges in MoS2 multilayers produced by anisotropic wet etching is analyzed. The topography of the edges is determined by the relative stability of different crystallographic directions and interlayer interactions. The spectroscopic characteristics of these edges, including enhanced second-order nonlinearity, are studied, and it is confirmed that ultrasharp hexagonal nanoholes in MoS2 grow along the most stable crystallographic directions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Marc Jankowski, Carsten Langrock, Boris Desiatov, Marko Loncar, M. M. Fejer
Summary: We propose a new approach to supercontinuum generation and carrier-envelope-offset detection based on saturated second-order nonlinear interactions in dispersion-engineered nanowaveguides. The technique developed here broadens the interacting harmonics by forming stable bifurcations of the pulse envelopes due to an interplay between phase-mismatch and pump depletion. The scaling laws suggest that future realization based on this approach could enable supercontinuum generation with orders of magnitude less energy than current state-of-the-art devices.
Article
Automation & Control Systems
Michael Ruderman
Summary: A novel nonlinear damping control scheme is proposed for second-order systems, demonstrating global asymptotic stability, passivity, and fast convergence without transient overshoots. Control saturation case is also explicitly analyzed in the study.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2021)
Article
Chemistry, Multidisciplinary
Conor T. Riley, Joseph S. T. Smalley, Kirk W. Post, Dimitri N. Basov, Yeshaiahu Fainman, Deli Wang, Zhaowei Liu, Donald J. Sirbuly
Article
Engineering, Electrical & Electronic
Joseph S. T. Smalley, Felipe Vallini, Qing Gu, Yeshaiahu Fainman
PROCEEDINGS OF THE IEEE
(2016)
Article
Engineering, Electrical & Electronic
Cheng-Yi Fang, Felipe Vallini, Abdelkrim El Amili, Joseph S. T. Smalley, Yeshaiahu Fainman
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2017)
Article
Chemistry, Multidisciplinary
Lorenzo Ferrari, Joseph Stephen Thomas Smalley, Yeshaiahu Fainman, Zhaowei Liu
Article
Multidisciplinary Sciences
Conor T. Riley, Joseph S. T. Smalley, Jeffrey R. J. Brodie, Yeshaiahu Fainman, Donald J. Sirbuly, Zhaowei Liu
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2017)
Article
Multidisciplinary Sciences
J. S. T. Smalley, F. Vallini, S. A. Montoya, L. Ferrari, S. Shahin, C. T. Riley, B. Kante, E. E. Fullerton, Z. Liu, Y. Fainman
NATURE COMMUNICATIONS
(2017)
Article
Biochemical Research Methods
Joseph S. T. Smalley, Felipe Vallini, Yeshaiahu Fainman
BIOMEDICAL OPTICS EXPRESS
(2017)
Review
Optics
Joseph S. T. Smalley, Felipe Vallini, Xiang Zhang, Yeshaiahu Fainman
ADVANCES IN OPTICS AND PHOTONICS
(2018)
Article
Chemistry, Multidisciplinary
Xi Li, Joseph S. T. Smalley, Zhitong Li, Qing Gu
APPLIED SCIENCES-BASEL
(2018)
Article
Physics, Applied
Xue Jiang, Chengzhi Shi, Yuan Wang, Joseph Smalley, Jianchun Cheng, Xiang Zhang
PHYSICAL REVIEW APPLIED
(2020)
Article
Multidisciplinary Sciences
Joseph S. T. Smalley, Xuexin Ren, Jeong Yub Lee, Woong Ko, Won-Jae Joo, Hongkyu Park, Sui Yang, Yuan Wang, Chang Seung Lee, Hyuck Choo, Sungwoo Hwang, Xiang Zhang
NATURE COMMUNICATIONS
(2020)
Article
Nanoscience & Nanotechnology
Zhitong Li, Joseph S. T. Smalley, Ross Haroldson, Dayang Lin, Roberta Hawkins, Abouzar Gharajeh, Jiyoung Moon, Junpeng Hou, Chuanwei Zhang, Walter Hu, Anvar Zakhidov, Qing Gu
Proceedings Paper
Nanoscience & Nanotechnology
Zhitong Li, Joseph S. T. Smalley, Ross Haroldson, Dayang Lin, Roberta Hawkins, Abouzar Gharajeh, Jiyoung Moon, Junpeng Hou, Chuanwei Zhang, Walter Hu, Anvar Zakhidov, Qing Gu
PHOTONIC AND PHONONIC PROPERTIES OF ENGINEERED NANOSTRUCTURES X
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Zhitong Li, Joseph S. T. Smalley, Ross Haroldson, Dayang Lin, Roberta Hawkins, Abouzar Gharajeh, Jiyoung Moon, Junpeng Hou, Chuanwei Zhang, Walter Hu, Anvar Zakhidov, Qing Gu
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2020)
Article
Automation & Control Systems
Joseph S. T. Smalley, Felipe Vallini, Abdelkrim El Amili, Yeshaiahu Fainman
SMART CITIES TECHNOLOGIES
(2016)