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Electron beam lithography of microbowtie structures for next
Electron beam lithography of microbowtie structures for next

... bowtie antenna intercepts the incident wave and concentrates its energy into the quasistatic dipole field in its gap region. The result is an illuminated area on the order of 1/5–1/10 of the wavelength across, with a transmission efficiency ranging fom 2% to as high as 30%. Grober’s concept was demo ...
Storing and processing optical information with ultraslow light in Bose-Einstein... Zachary Dutton and Lene Vestergaard Hau
Storing and processing optical information with ultraslow light in Bose-Einstein... Zachary Dutton and Lene Vestergaard Hau

... parameters and see a variety of novel dynamics occur, including interference fringes, gentle breathing excitations, and two-component solitons, depending on the relative scattering lengths of the atomic states used and the probe to coupling intensity ratio. We find that the dynamics when the levels ...
azu_td_9829319_sip1_
azu_td_9829319_sip1_

... manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continui ...
Matter wave interferences of potassium molecules and the influence
Matter wave interferences of potassium molecules and the influence

... of collisions with potassium atoms in the ground state The aim of the current work is to investigate the suitability and the precision of molecular matter wave interferometry for study of weak interactions like cold collisions. For this a Ramsey-Bordé setup of a molecular matter wave interferometer ...
SELF-CONSISTENT SIMULATION OF RADIATION AND SPACE-CHARGE IN HIGH-BRIGHTNESS RELATIVISTIC ELECTRON BEAMS
SELF-CONSISTENT SIMULATION OF RADIATION AND SPACE-CHARGE IN HIGH-BRIGHTNESS RELATIVISTIC ELECTRON BEAMS

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Diffraction Grating Handbook
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Modern Physics - Harvey Mudd College

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Modern Physics - Harvey Mudd College
Modern Physics - Harvey Mudd College

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Relationship of the total integrated scattering from

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Harmonically resonant cavity as a bunchlength monitor
Harmonically resonant cavity as a bunchlength monitor

... than the number of discontinuities are removed from the cavity’s mode spectrum. Finally, the shape of the cavity was tuned such that the TM0N0 modes are harmonic. This was accomplished by iteratively modifying the cavity’s geometry and solving for the TM0N0 mode frequencies with the field solver PO ...
Shaping of light beams with photonic crystals: spatial filtering, beam collimation
Shaping of light beams with photonic crystals: spatial filtering, beam collimation

positively charged - Colorado Mesa University
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Laser power beaming feasibility: non-mechanical beam steering
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... This concept is successfully used for phase-locking of electric fields in the micro wave regime. Here the beam steering is performed with an array of antennas and a controlled phase shift between the different signals of the various antennas [1]. With a view to transfer this technique to laser beams ...
Optics of Liquid Crystals
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Atmospheric Optics - Wiley-VCH
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Adaptive Optics for Optical Coherence Tomography
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Waves In Pair Plasma and Mechanism Of Radio Emission In Pulsars
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Fluorescencedetected wave packet interferometry
Fluorescencedetected wave packet interferometry

... some of the effect of phase control on the two-pulse photodissociation yield ofNal. In addition, they provide an interesting discussion of the analogy between mUltiple slit scattering phenomena and multiple pulse excitation with phase controL Previous theoretical work on the interference effects of ...
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Diffraction



Diffraction refers to various phenomena which occur when a wave encounters an obstacle or a slit. In classical physics, the diffraction phenomenon is described as the interference of waves according to the Huygens–Fresnel principle. These characteristic behaviors are exhibited when a wave encounters an obstacle or a slit that is comparable in size to its wavelength. Similar effects occur when a light wave travels through a medium with a varying refractive index, or when a sound wave travels through a medium with varying acoustic impedance. Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, X-rays and radio waves.Since physical objects have wave-like properties (at the atomic level), diffraction also occurs with matter and can be studied according to the principles of quantum mechanics. Italian scientist Francesco Maria Grimaldi coined the word ""diffraction"" and was the first to record accurate observations of the phenomenon in 1660.While diffraction occurs whenever propagating waves encounter such changes, its effects are generally most pronounced for waves whose wavelength is roughly comparable to the dimensions of the diffracting object or slit. If the obstructing object provides multiple, closely spaced openings, a complex pattern of varying intensity can result. This is due to the addition, or interference, of different parts of a wave that travels to the observer by different paths, where different path lengths result in different phases (see diffraction grating and wave superposition). The formalism of diffraction can also describe the way in which waves of finite extent propagate in free space. For example, the expanding profile of a laser beam, the beam shape of a radar antenna and the field of view of an ultrasonic transducer can all be analyzed using diffraction equations.
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