Gigantic nonlinear optical polarizability of semiconductor microcrystallites |
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| Affiliation: | 1. Department of Materials Science and Engineering, North Carolina State University, 911 Partners Way Engineering Building 1, Raleigh, NC 27606, USA;2. School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia;3. School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia;4. Monash Centre for Electron Microscopy, Monash University, Clayton, Victoria 3800, Australia;5. Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia;1. Leibniz Institute of Surface Modification, Permoserstr. 15, D-04318 Leipzig, Germany;2. Universität Leipzig, Institut für Experimentelle Physik II, Linnéstraße 5, D-04103 Leipzig, Germany;1. Dept of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA;2. Seitz Materials Research Laboratory, University of Illinois, Urbana, IL 61801, USA;3. CEA/INAC/SP2M/LEMMA, 19 rue des Martyrs, 38 054 Grenoble, France |
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| Abstract: | We analyze theoretically the nonlinear optical properties of semiconductor box so small that quantum confinement effect works in all three dimensions. It is shown for the first time that the third order optical polarizability of an assembly of such quantum boxes is enhanced by a number of unit cells in the box through the effect of the giant oscillator strength when the box size satisfies the conditions given in terms of size-quantization energy, exciton binding energy, interaction energy of two excitations and the off-resonance energy. Microcrystallites of CuCl look a promising material to observe this effect. |
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