نتایج جستجو برای: dimensional deviations
تعداد نتایج: 430882 فیلتر نتایج به سال:
Suppose that the integers are assigned random variables f! i g (taking values in the unit interval), which serve as an environment. This environment deenes a random walk fX n g (called a RWRE) which, when at i, moves one step to the right with probability ! i , and one step to the left with probability 1 ? ! i. When the f! i g sequence is i.i.d., Greven and den Hollander (1994) proved a large d...
It is well known that waves incident upon a crystal are transported only over limited distance - the Bragg length before being reflected by interference. Here, we demonstrate how to send much deeper into crystals, studying light in exemplary two-dimensional silicon photonic crystals. By spatially shaping optical wavefronts, observe intensity of laterally scattered light, probes internal energy ...
Two dimensional fluorescence spectroscopy on suspensions of carbon nanotubes probes the electronic excitations of carbon nanotubes with unprecedented resolution and reveals systematic deviations from the predictions of conventional one electron theories. We address these problems by formulating a theory of the scaling optical excitation energies with band index, tube radius and chiral angle. Th...
The accurate characterization of eigenmodes and eigenfrequencies of two-dimensional ion crystals provides the foundation for the use of such structures for quantum simulation purposes. We present a combined experimental and theoretical study of two-dimensional ion crystals. We demonstrate that standard pseudopotential theory accurately predicts the positions of the ions and the location of stru...
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