منابع مشابه
Dynamics of evanescent matter waves in negative-index media
Semi-evanescent and evanescent matter-waves produced by an atom wave packet impinging a repulsive barrier can be back-refracted and reconstructed by the application of negative-index “comoving” potential pulses. One shows that those collapses and revivals generate a matter wave confined on both sides of the barrier border (“surface matter wave”) and should be observable via the retardation of a...
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When an electromagnetic wave (light) in a dielectric medium of index n1 is incident upon an interface of a different dielectric material of a lower optical density, n2 at an angle θ1 greater than the critical angle, θc = sin−1(n2/n1), total internal reflection (TIR) occurs. Although all of the incident energy is reflected, an electromagnetic field with exponentially decreasing intensity propaga...
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A renormalizable theory of quantum gravity coupled to a dilaton and conformal matter in two space-time dimensions is analyzed. The theory is shown to be exactly solvable classically. Included among the exact classical solutions are configurations describing the formation of a black hole by collapsing matter. The problem of Hawking radiation and backreaction of the metric is analyzed to leading ...
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The indirect bandgap of Si has been a key hurdle in the achievement of optical gain elements. Raman lasers and amplifiers1-3 have been demonstrated, and optical gain in nanopatterned Si4 has also been observed, but an electrically pumped all-Si gain element has yet to be realized. An alternative to creating an electrically pumped all-Si gain mechanism is to take prefabricated lasers and couple ...
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ژورنال
عنوان ژورنال: Annalen der Physik
سال: 2012
ISSN: 0003-3804
DOI: 10.1002/andp.201200072