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An integrated and automated smart structures approach for structural health monitoring is presented, utilizing an array of piezoelectric transducers attached to or embedded within the structure for both actuation and sensing. The system…

Sound · Computer Science 2015-05-13 Peter F. Lichtenwalner , Donald A. Sofge

Proposals to determine biomolecular structures from diffraction experiments using femtosecond X-ray free-electron laser (XFEL) pulses involve a conflict between the incident brightness required to achieve diffraction-limited atomic…

Optics · Physics 2015-05-19 Harry M. Quiney , Keith A. Nugent

Optical localized states are usually defined as self-localized bistable packets of light which exist as independently controllable optical intensity pulses either in the longitudinal or transverse dimension of nonlinear optical systems.…

Optics · Physics 2015-06-22 B. Garbin , J. Javaloyes , G. Tissoni , S. Barland

High-quality and prebunched electron beams can produce coherent x-rays with high intensity and narrow bandwidth, which is essential for modern light sources. An all-optical scheme based on plasma-based acceleration to produce bright…

A comprehensive approach for simulating lasing dynamics in a liquid crystal based laser is presented. The approach takes into account the transformation of the liquid crystal structure caused by applied voltage. In particular, it allows us…

We couple a double-channel imaging technique, allowing for the simultaneous acquisition of high-quality and high-resolution intensity and peak emission wavelength profiles [T. Wang and G.L. Lippi, Rev. Sci. Instr. 86, 063111 (2015)], to the…

Optics · Physics 2015-11-13 T. Wang , G. L. Lippi

Weakly-supervised object localization (WSOL) has gained popularity over the last years for its promise to train localization models with only image-level labels. Since the seminal WSOL work of class activation mapping (CAM), the field has…

Computer Vision and Pattern Recognition · Computer Science 2020-04-02 Junsuk Choe , Seong Joon Oh , Seungho Lee , Sanghyuk Chun , Zeynep Akata , Hyunjung Shim

The glass is a disordered solid that processes distinct dynamical and elastic properties compared with crystal. How heterogeneous glassy materials can be and to what extent dynamics is encoded with structure and elasticity are long-standing…

Soft Condensed Matter · Physics 2019-04-02 Bo Li , Kai Lou , Walter Kob , Steve Granick

Manipulating energy levels while controlling the electron localization is an essential step for many applications of confined systems. In this paper we demonstrate how to achieve electron localization and induce energy level oscillation in…

Mesoscale and Nanoscale Physics · Physics 2015-05-25 Fahhad H. Alharbi , Pablo Serra , Marcelo Carignano , Sabre Kais

Efficient, low threshold, and compact semiconductor laser sources are being investigated for many applications in high-speed communications, information processing, and optical interconnects. The best edge-emitting and vertical cavity…

Materials Science · Physics 2011-05-06 Bryan Ellis , Marie Mayer , Gary Shambat , Tomas Sarmiento , James Harris , Eugene Haller , Jelena Vuckovic

Weakly supervised object detection (WSOD), which is the problem of learning detectors using only image-level labels, has been attracting more and more interest. However, this problem is quite challenging due to the lack of location…

Computer Vision and Pattern Recognition · Computer Science 2017-06-22 Baisheng Lai , Xiaojin Gong

Controlling the longitudinal phase space of high-brightness relativistic electron beams is crucial for advancing a broad spectrum of charged-particle-based instrumentation and scientific frontiers. A generalized method for achieving this…

Compact varifocal lenses are essential to various imaging and vision technologies. However, existing varifocal elements typically rely on mechanically-actuated systems with limited tuning speeds and scalability. Here, an ultrathin…

We analyze how a star network topology shapes the dynamics of coupled CO\textsubscript{2} lasers with an intracavity electro-optic modulator that exhibit bistability. Such a network supports spreading and stationary activation patterns. In…

Chaotic Dynamics · Physics 2018-11-21 Joniald Shena , Johanne Hizanidis , Nikos E. Kouvaris , Giorgos P. Tsironis

We compare fundamental characteristics of proposed electrically pumped subwavelength plasmonic lasers (spasers) with ubiquitous all-dielectric semiconductor micro-lasers (VCSEL) and indicate their close similarities as well as large…

Optics · Physics 2013-09-10 Jacob B Khurgin , Greg Sun

The excited short-lived volume-localized electron quantum levels (VLELs) existent due to Coulomb potential well inside positive ion are analytically investigated in the paper using a simplified spherical fullerene model. Hence, those…

Mesoscale and Nanoscale Physics · Physics 2018-06-20 R. V. Arutyunyan , A. D. Vasiliev

The photoelectron momentum distribution in the strong-field ionization has a variety of structures that reveal the complicated dynamics of this process. Recently, we identified a low-energy interference structure in the case of a…

Atomic Physics · Physics 2022-04-27 Lei Geng , Hao Liang , Liang-You Peng

We demonstrate the possibility to run a single-pass free-electron laser in a new dynamical regime, which can be exploited to perform two-colour pump-probe experiments in the VUV/X-ray domain, using the free-electron laser emission both as a…

Optics · Physics 2015-06-11 Giovanni De Ninno , Enrico Allaria , Benoit Mahieu

Electroluminescence emission from surface acoustic wave-driven light-emitting diodes (SAWLEDs) is studied by means of time-resolved techniques. We show that the intensity of the SAW-induced electroluminescence is modulated at the SAW…

Other Condensed Matter · Physics 2009-11-11 Marco Cecchini , Vincenzo Piazza , Fabio Beltram , D. G. Gevaux , M. B. Ward , A. J. Shields , H. E. Beere , D. A. Ritchie

The bubble structure generated by laser and plasma interactions changes in size depending on the local plasma density. The self injection electrons position with respect to wakefield can be controlled by tailoring the longitudinal plasma…

Plasma Physics · Physics 2014-09-02 Q. Yu , Y. J. Gu , X. F. Li , S. Huang , F. Zhang , Q. Kong , Y. Y. Ma , S. Kawata