Abstract
We report on the first observation of third-order intersubband nonlinearities in a quantum well structure. We have measured the dc Kerr effect in a symmetric quantum well and found that the Kerr coefficients due to intersubband transitions are six orders of magnitude larger than that of bulk GaAs. To our best knowledge this is the largest value ever measured for the third-order susceptibility. By including dc screening effects and evaluating the internal electric field in the well, a good agreement between the calculated coefficients and the experimental ones was found.
| Original language | English |
|---|---|
| Pages (from-to) | 1263-1265 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 61 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1992 |
| Externally published | Yes |