Nature of charge transport in quantum-cascade lasers
The first global quantum simulation of semiconductor-based quantum-cascade lasers is presented. Our three-dimensional approach allows us to study in a purely microscopic way the current-voltage characteristics of state-of-the-art unipolar nanostructures, and therefore to answer the long-standing con...
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| Published in | Physical review letters Vol. 87; no. 14; p. 146603 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
01.10.2001
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| Online Access | Get more information |
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| Summary: | The first global quantum simulation of semiconductor-based quantum-cascade lasers is presented. Our three-dimensional approach allows us to study in a purely microscopic way the current-voltage characteristics of state-of-the-art unipolar nanostructures, and therefore to answer the long-standing controversial question: Is charge transport in quantum-cascade lasers mainly coherent or incoherent? Our analysis shows that (i) quantum corrections to the semiclassical scenario are minor and (ii) inclusion of carrier-phonon and carrier-carrier scattering gives excellent agreement with experimental results. |
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| ISSN: | 0031-9007 |
| DOI: | 10.1103/physrevlett.87.146603 |