Results 241 to 250 of about 496,345 (292)
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Nonreciprocal Frequency Domain Beam Splitter
Physical Review Letters, 2021The canonical beam splitter-a fundamental building block of quantum optical systems-is a reciprocal element. It operates on forward- and backward-propagating modes in the same way, regardless of direction. The concept of nonreciprocal quantum photonic operations, by contrast, could be used to transform quantum states in a momentum- and direction ...
Nils T. Otterstrom +10 more
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Bending of Beams in Superelasticity Domain
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2000AbstractThe paper deals with bending of beams made of shape memory material (SMM). The research is focused on the modelling of a bending process in the superelasticity region, which w one of the characteristics of SMM. On the basis of a chosen physical model, a computer program has been set up for numerical modelling of the stress‐strain and ...
Kosel, Franc, Bundara, Borut
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Polarization Domain Wall Solitons with Counterpropagating Laser Beams
CLEO/Europe Conference on Lasers and Electro-Optics, 1998The coupling between two intense laser beams in a nonlinear dielectric leads to a host of physical effects. In particular, the interaction between the polarization states of two counterpropagating ligth beams may generate polarization domain wall (PDW7) solitons [1].
S. Pitois, G. Millot, WABNITZ, Stefan
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Adaptive beam forming in time-domain
2011 International Conference on Electromagnetics in Advanced Applications, 2011This paper introduces a new technique for adaptive beam forming in time domain of an array of slot antennas with finite widths. The time dependent field is computed using the closed-form expressions for the radiated EM fields. The radiated energy is focused at a desired space and time and minimized in other regions to satisfy the requirements of a ...
P. Kadlec, M. Stumpf, Z. Raida
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Time-domain reflective beam propagation method
IEEE Journal of Quantum Electronics, 2004A time-domain reflective beam propagation method (TD-RBPM) is presented for the analysis of optical pulse propagation and reflection in waveguide structures with multiple discontinuities. By utilizing an implicit scheme, the method allows relatively large time steps and, therefore, is highly efficient.
null Ning-Ning Feng, null Wei-Ping Huang
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UWB time‐domain antennas beam scanning
Microwave and Optical Technology Letters, 2010AbstractUltra‐wideband (UWB) antenna is indispensable in impulse radar that transmits and receives short electromagnetic pulse signals and preserves the waveform well. Phased array antenna systems cannot meet the demand of the system. Optical true‐time delay techniques open the possibility of ultra‐wide bandwidth antenna systems, while at the same time
L.‐H. Zhang, C.‐L. Ruan, G.‐Y. Liu
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Optical implementation of a time-domain beam former
Optics Letters, 1986We report on an optical implementation of a time-domain beam former that uses a low-cost, low-power, twodimensional spatial light modulator (liquid-crystal television) to generate eight beams from eight sensors. The optical architecture can be classified as a vector-matrix multiplier.
P B, Rolsma, R D, Griffin, J N, Lee
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Optical time-domain beam former implementations
Annual Meeting Optical Society of America, 1986A time-domain beam former spatially filters signals by weighting, delaying, and coherently summing the outputs of an array of sensors. Since a wavefront propagating across the array arrives at different sensors at different times, this operation can steer a maximum-response axis (or beam) of the array toward the propagation direction of the wavefront ...
P. B. Rolsma +2 more
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Beam optics applications: quantumlike versus classical-like domains
The European Physical Journal D - Atomic, Molecular and Optical Physics, 2003A review of the charged-particle beam optics in terms of recently developed approaches within both classical-like and quantumlike frameworks is presented. On the basis of the mutual connection of optics and mechanics, a brief overview of the quantumlike approach to electron optics is presented.
FEDELE, RENATO, M. A. Man'ko
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Time domain compressive beam forming of ultrasound signals
The Journal of the Acoustical Society of America, 2015Ultrasound imaging is a wide spread technique used in medical imaging as well as in non-destructive testing. The technique offers many advantages such as real-time imaging, good resolution, prompt acquisition, ease of use, and low cost compared to other techniques such as x-ray imaging.
Guillaume, David +3 more
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