Article
Nanoscience & Nanotechnology
Bingdong Chang, Ding Zhao, Hongyu Sun
Summary: This study introduces a new mechanism for creating wrinkles on a rigid substrate using photoresist layers. By introducing bending deformation and fluorine-based plasma treatment, wrinkles with a characteristic wavelength less than 1 μm can be achieved. Additionally, micropatterns on photoresists with UV exposure can produce ordered wrinkles, demonstrating the applicability of this technique in creating high-aspect-ratio silicon gratings and large-area silicon dioxide membranes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Computer Science, Software Engineering
Jonas Martinez
Summary: This study presents a computational approach to optimizing random porous materials via parametric growth processes, with a focus on minimizing Poisson's ratio to generate auxetic materials. The research shows that the growth process can implicitly generate auxetic materials, enabling large-scale computation on commodity computers with promising numerical and physical test results.
COMPUTER-AIDED DESIGN
(2021)
Article
Optics
Jinhua Hu, Hui Guan, Xiuhong Liu, Danping Ren, Jijun Zhao
Summary: A high-performance optical sensor with a vertical cavity structure has been designed, which utilizes high contrast gratings and a distributed Bragg reflector to achieve two different peak values. The spectral reflection dips can also be adjusted by changing the structural parameters.
Article
Optics
Jinhua Hu, Hui Guan, Xiuhong Liu, Danping Ren, Jijun Zhao
Summary: In this study, a high-performance optical sensor with a vertical cavity structure comprising high-contrast gratings (HCGs) and a distributed Bragg reflector was designed. The structure has two peaks with different mechanisms, and changing the structural parameters allows for tuning of the spectral reflection dips. The designed structure exhibits high sensitivity and can be applied to gas sensing applications.
Article
Optics
Yufang Ding, Jinsheng Liu, Xingbin Gu, Peng Yuan, Jingui Ma
Summary: We demonstrate highly efficient mid-infrared quasi-parametric chirped-pulse amplification (QPCPA) using a Sm3+-doped La3Ga5.5Nb0.5O14 (Sm:LGN) crystal. With pump wavelength at 1 μm, Sm3+ broadband absorption enables QPCPA for femtosecond signal pulses at 3.5 or 5 μm with near quantum-limited conversion efficiency. The mid-infrared QPCPA based on Sm:LGN exhibits robustness against phase-mismatch and pump-intensity variation due to back conversion suppression. This approach efficiently converts intense laser pulses at 1 μm into mid-infrared ultrashort pulses.
Article
Mathematics
Raphael Yuster
Summary: The number of Hamiltonian cycles in relation to the density of the graph is a complex issue. For hypergraphs with r>=3, the number of Hamiltonian cycles typically exceeds the expected value by a large factor.
JOURNAL OF COMBINATORIAL THEORY SERIES B
(2022)
Article
Optics
Jingui Ma, Kainan Xiong, Peng Yuan, Xiaoniu Tu, Jing Wang, Guoqiang Xie, Yanqing Zheng, Liejia Qian
Summary: This study reports the application of a specially designed crystal in quasi-parametric chirped-pulse amplification, which can improve pump depletion and laser amplification efficiency, paving the way for the development of ultraintense laser technology.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Fernando A. Reboredo, Paul R. C. Kent, Jaron T. Krogel
Summary: We aim to improve the variational Monte Carlo (VMC) approach for calculating excitations by using an auxiliary bosonic (AB) ground state and a fermionic component factor. Our approach successfully captures the instantaneous change in imaginary time of excitations in an interacting fermionic system by measuring observables in an AB system with an auxiliary effective potential. The results show the promising potential of this method in accurately calculating excitations and outperforming conventional approximations.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Optics
Edgars Nitiss, Jianqi Hu, Anton Stroganov, Camille-Sophie Bres
Summary: In this study, optically reconfigurable quasi-phase-matching is proposed in large-radius silicon nitride microresonators for efficient and tunable second-harmonic generation in silicon photonics. The photogalvanic effect is shown to overcome phase mismatch constraints, even in resonant systems.
Article
Acoustics
Susheelkumar C. Subramanian, Sangram Redkar
Summary: In this study, asymptotic stability bounds are identified for a class of linear quasi-periodic dynamical systems with stochastic parametric excitations and nonlinear perturbations. The approach used in previous research for time periodic systems is extended to linear quasi-periodic systems with stochastic parameter variations. The stability conditions for quasi-periodic systems with nonlinear perturbations are formulated using the Lyapunov's direct approach. Practical examples of commutative and noncommutative quasi-periodic systems are used to demonstrate the applications of stability theorems.
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Optics
Xuefang Hu, Weiyi Jing, Changgui Lu, Xiangyue Zhao, Yongqiang Bai, Yinwei Gu, Mengjia Lu, Zhongjie Zhu
Summary: This paper proposes a tunable grating based on a hybrid structure, which can control the duty cycle and height of the grating by adjusting the voltage. Numerical results show that the grating can change the absorption of graphene when exciting surface plasmon polaritons. This research has potential applications in future optical modulators, photodetectors, and sensors.
OPTICS COMMUNICATIONS
(2022)
Article
Optics
Colton Fruhling, Kang Wang, Sarah Chowdhury, Xiaohui Xu, Jeffrey Simon, Alexander Kildishev, Letian Dou, Xiangeng Meng, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: Coherent random lasing in subwavelength quasi-2D perovskite films is observed and studied. Statistical analysis reveals Levy-like intensity fluctuations, replica symmetry breaking confirms random lasing, and spectral and spatial correlation techniques are used to study coherent modes. The observed coherent lasing modes are extended states that result from the random crystal grain structure during fabrication and out-compete diffusive lasing due to their coherence.
LASER & PHOTONICS REVIEWS
(2023)
Article
Mathematics
Qile Chen, Felix Janda, Rachel Webb
Summary: The study generalizes results on the moduli of p-fields to the setting of (quasi-)maps to complete intersections in arbitrary smooth Deligne-Mumford stacks. It demonstrates that the virtual cycle of stable (quasi-)maps to a complete intersection can be recovered by the cosection localized virtual cycle of the moduli of p-fields of the ambient space.
ADVANCES IN MATHEMATICS
(2021)
Article
Mathematics
Jiahui Zhu, Xinyun Wang, Heling Su
Summary: In this paper, we examine a 2D stochastic quasi-geostrophic equation driven by jump noise in a smooth bounded domain. We prove the local existence and uniqueness of mild L-p(D)-solutions for the dissipative quasi-geostrophic equation with a full range of subcritical powers alpha is an element of (1/2,1] by employing the semigroup theory and fixed point theorem. Our approach, which is based on the Yosida approximation argument and Ito formula for the Banach space valued processes, enables us to establish some uniform bounds for the mild solutions. Furthermore, we prove the global existence of mild solutions in L-infinity(0,T;L-p(D)) space for all p > 2/2 alpha-1, consistent with the deterministic case.
Article
Environmental Sciences
Rakesh Krishnamoorthy Iyer, Jarod C. Kelly, Amgad Elgowainy
Summary: Medium-and heavy-duty vehicles contribute significantly to greenhouse gas emissions in the United States, with efforts to reduce these emissions focusing on diesel hybrids, hydrogen fuel cells, and battery electric vehicles. However, the production of lithium-ion batteries and carbon fiber used in fuel-cell vehicles contribute heavily to emissions. A life-cycle analysis comparing different powertrains for Class 6 and Class 8 trucks reveals that common systems dominate vehicle-cycle emissions for diesel, hybrid, and fuel-cell powertrains, while propulsion systems contribute substantially to electric and fuel-cell powertrains. Switching to alternative electric and fuel-cell powertrains increases vehicle-cycle GHG emissions but leads to overall reductions when considering the combined vehicle and fuel cycles.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Optics
I. J. Graumann, A. Diebold, C. G. E. Alfieri, F. Emaury, B. Deppe, M. Golling, D. Bauer, D. Sutter, C. Kraenkel, C. J. Saraceno, C. R. Phillips, U. Keller
Article
Optics
F. Labaye, M. Gaponenko, V. J. Wittwer, A. Diebold, C. Paradis, N. Modsching, L. Merceron, F. Emaury, I. J. Graumann, C. R. Phillips, C. J. Saraceno, C. Kraenkel, U. Keller, T. Suedmeyer
Article
Multidisciplinary Sciences
A. S. Mayer, C. R. Phillips, U. Keller
NATURE COMMUNICATIONS
(2017)
Article
Optics
J. Danek, M. Klaiber, K. Z. Hatsagortsyan, C. H. Keitel, B. Willenberg, J. Maurer, B. W. Mayer, C. R. Phillips, L. Gallmann, U. Keller
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2018)
Article
Optics
A. Diebold, F. Saltarelli, I. J. Graumann, C. J. Saraceno, C. R. Phillips, U. Keller
Article
Optics
N. Bigler, J. Pupeikis, S. Hrisafov, L. Gallmann, C. R. Phillips, U. Keller
Article
Optics
Maria V. Chekhova, Semen Germanskiy, Dmitri B. Horoshko, Galiya Kh. Kitaeva, Mikhail I. Kolobov, Gerd Leuchs, Chris R. Phillips, Pavel A. Prudkovskii
Article
Physics, Multidisciplinary
Marc Jankowski, Alireza Marandi, C. R. Phillips, Ryan Hamerly, Kirk A. Ingold, Robert L. Byer, M. M. Fejer
PHYSICAL REVIEW LETTERS
(2018)
Correction
Multidisciplinary Sciences
A. S. Mayer, C. R. Phillips, U. Keller
NATURE COMMUNICATIONS
(2018)
Article
Optics
N. Bigler, J. Pupeikis, S. Hrisafov, L. Gallmann, C. R. Phillips, U. Keller
Proceedings Paper
Engineering, Electrical & Electronic
S. A. Germanskiy, C. R. Phillips, D. B. Horoshko, M. I. Kolobov, G. Kh. Kitaeva, G. Leuchs, M. V. Chekhova
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
I. J. Graumann, A. Diebold, F. Emaury, B. Deppe, C. R. Phillips, M. Golling, D. Bauer, P. Heu, D. Follman, G. D. Cole, M. Aspelmeyer, D. Sutter, C. Kraenkel, C. J. Saraceno, U. Keller
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
A. S. Mayer, C. R. Phillips, U. Keller
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Marc Jankowski, Alireza Marandi, C. R. Phillips, Ryan Hamerly, Kirk A. Ingold, R. L. Byer, M. M. Fejer
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2017)
Article
Optics
J. Maurer, B. Willenberg, J. Danek, B. W. Mayer, C. R. Phillips, L. Gallmann, M. Klaiber, K. Z. Hatsagortsyan, C. H. Keitel, U. Keller
