Tomic, S, Milanović, V and Ikonić, Z 1997, 'Optimization of intersubband resonant second-order susceptibility in asymmetric graded AlxGa1-xAs quantum wells using supersymmetric quantum mechanics' , Physical Review B, 56 (3) , pp. 1033-1036.
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Abstract
A systematic procedure is proposed for the design of ternary alloys based quantum-well structures optimized for double-resonance second-harmonic generation. The method relies on the supersymmetric quantum mechanics as derived here for the case of position-dependent effective mass. Starting from a symmetric, truncated quasiparabolic potential, itself lacking any second-order nonlinearity, we generate a family of asymmetric potentials, fully isospectral with the starting potential, and choose the one which maximizes the product of transition matrix elements relevant for the second-order nonlinearity. Realization of the optimized potential (in an approximate manner) by grading the ternary alloy AlxGa1-xAs is then described. The best value of nonlinear susceptibility obtained exceeds those reported in the literature.
| Item Type: | Article |
|---|---|
| Themes: | Energy |
| Schools: | Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre |
| Journal or Publication Title: | Physical Review B |
| Publisher: | American Physical Society |
| Refereed: | Yes |
| ISSN: | 0163-1829 |
| Depositing User: | Prof Stanko Tomic |
| Date Deposited: | 07 Nov 2011 12:31 |
| Last Modified: | 10 Aug 2017 01:48 |
| URI: | http://usir.salford.ac.uk/id/eprint/18894 |
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